research papers on encryption and decryption

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Research papers on encryption and decryption how to write capability development documents

Research papers on encryption and decryption

Chandrasekaran , Arnav Bhutani , Vansh Badkul. Email s : : marans gmail. DOI: Address: A. Published In: Volume - 9 , Issue - 12 , Year - Cite this article: A. Manimaran, V. Chandrasekaran, Arnav Bhutani, Vansh Badkul. A New Approach for Encryption and Decryption. Research J.

Author s : G. Manikandan, P. Rajendiran, V. Harish, Nooka Sai Kumar. Medicinal Plants from Solanaceae Family. A comparative, Bioequivalence study to evaluate the safety and pharmacokinetic profile of single dose Ivabradine 7. Recent Advancements in Laminates and Veneers in Dentistry. Analytical method development and validation of ambroxol hydrochloride by UV spectroscopy and forced degradation study and detection of stability.

A review on MBT system in orthodontics. About Journal Contact Us. Research Journal of Pharmacy and Technology. Submit Article. Recomonded Articles:. Author s : Jayan. As the proposed system provides a secure communication environment, it is supposed to be useful for the secret communication inside different governmental and non-governmental organisations.

The law enforcements can use this system for any of their operations as it will encrypt and decrypt message to give a secure platform for communication. Encrypted signal processing has attracted considerable research interests. Adaptive filtering can be implemented in the encrypted domain based on the homomorphic properties of a cryptosystem, and a composite signal representation method Adaptive filtering can be implemented in the encrypted domain based on the homomorphic properties of a cryptosystem, and a composite signal representation method can be used to reduce the size of encrypted data and computation complexity.

So we can use the new approach of the paper proposes a novel scheme of scalable coding for encrypted gray images. Although there have been a lot of works on scalable coding of unencrypted images, the scalable coding of encrypted data has not been reported. In the encryption phase of the proposed scheme, the pixel values are completely concealed so that an attacker cannot obtain any statistical information of an original image. Then, the encrypted data are decomposed into several parts, and each part is compressed as a bit stream.

At the receiver side with the cryptographic key, the principal content with higher resolution can be reconstructed when more bit streams are received. Cryptographic applications are becoming increasingly more important in today's world of data exchange, big volumes of data need to be transferred safely from one location to another at high speed. In this paper, the parallel In this paper, the parallel implementation of blowfish cryptography algorithm is evaluated and compared in terms of running time, speed up and parallel efficiency.

The parallel implementation of blowfish is implemented using message passing interface MPI library, and the results have been conducted using IMAN1 Supercomputer. The experimental results show that the runtime of blowfish algorithm is decreased as the number of processors is increased. Mahmoud Rajallah Asassfeh. A new scheme for user authentication is proposed using visual cryptography and invisible digital watermarking. Visual cryptography which allows visual information to be encrypted in such a way that decryption becomes the job of the person Visual cryptography which allows visual information to be encrypted in such a way that decryption becomes the job of the person to decrypt via a sight reading.

In the proposed work, user signature will be embedded within the cover media. It may be text, images, audio, video etc. Here we used cover image for embedding data by using a single bit LSB watermark insertion algorithm.

After that the image will be split into two shares. Shares will be later encrypted by using a Column Shift Permutation algorithm. Receiver will decrypt the shares using Column Shift Permutation algorithm. Shares are collected and stamp together by receiver to get cover image. Then signature will be de-embedded from the cover image. Data will be transfer using communication media. Image will be passed in more secure manner without any distortion. This method is very efficient and effective.

The method can be implemented with minimum processing. This application used in customer identification in bank and in online voting. Data security is now a crucial issue now in our day to day life. The protection of personal identity, personal finances depend on the protection of important and irreplaceable information. Cryptography is the science of converting some Cryptography is the science of converting some readable information into something unreadable format, which are hard to decipher.

In modern times, cryptography has adopted a new medium: human DNA. At a time when conventional cryptography has been losing strength to more advanced cryptanalysis, DNA cryptography has added more elements of confusion and diffusion. The use of DNA sequences to encrypt data has strengthened the existing classical encryption algorithms. Thus, DNA cryptography has added another dimension to conventional cryptography.

In the present paper the authors have made a systematics study on DNA encryption algorithms and how it can be used along with standard classical encryption algorithms. Anurag Roy. The goal of e-learning is to benefit from the capabilities offered by new information technology such as remote digital communications, multimedia, internet, cell phones, teleconferences, etc.

Content provides a service to provide most if not all basic and business services; content of communicative link provides the citizen and the state agencies together all the time and provides content security for all workers on this network to work in securely environment. Access to information as well is safeguarded.

Shadi R Masadeh. Nidal Turab. We must understand that what is at play in the current political crisis in Brazil is much more than a domestic scuffle; what is at play is the future of coloniality and the forms of liberation from it. In the terms I put forth in my The Hill cipher algorithm is one of the symmetrickey algorithms that have several advantages in data encryption as well as decryptions.

But, the inverse of the key matrix used for encrypting the plaintext does not always exist. Then if Then if the key matrix is not invertible, then encrypted text cannot be decrypted. In the Involuntary matrix generation method the key matrix used for the encryption is itself invertible. So, at the time of decryption we need not to find the inverse of the key matrix.

The objective of this paper is to encrypt an text using a technique different from the conventional Hill Cipher. Kemajuan dan perkembangan teknologi informasi dewasa ini telah berpengaruh pada seluruh aspek kehidupan manusia, termasuk bidang komunikasi. Informasi-informasi rahasia perlu disimpan atau disampaikan melalui suatu cara tertentu agar Informasi-informasi rahasia perlu disimpan atau disampaikan melalui suatu cara tertentu agar tidak diketahui oleh pihak yang tidak dikehendaki Oleh karena itu terciptalah ilmu kriptografi.

Kriptografi merupakan ilmu sekaligus seni untuk menjaga kerahasiaan pesan dengan cara menyamarkannya menjadi bentuk tersandi yang tidak mempunyai makna. Pesan yang disamarkan teks jelas yang dapat imengerti dinamakan plainteks, sedangkan pesan hasil penyamaran teks tersandi dinamakan chiperteks. Proses kriptografi terdiri atas enkripsi dan dekripsi. Enkripsi merupakan proses penyamaran dari plainteks ke chiperteks sedangkan dekripsi merupakan proses pembalikan dari chiperteks ke plainteks.

Terdapat berbagai algoritma kriptografi, salah satunya adalah algoritma El Gamal. Algoritma El Gamal sendiri merupakan algoritma yang termasuk dalam kategori algoritma asimetris. Keamanan algoritma El Gamal terletak pada kesulitan perhitungan diskrit pada bilangan modulo prima yang besar. Algoritma El Gamal memiliki kunci publik berupa tiga bilangan dan kunci rahasia berupa satu bilangan. Algoritma El Gamal terdiri dari tiga proses, yaitu pembentukan kunci, proses enkripsi dan proses dekripsi.

El Gamal Digital Signature merupakan sebuah algoritma untuk Aunthentication. Related Topics. Privacy Preserving. Follow Following. Encryption Algorithms.

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Cheap expository essay proofreading website us Section III, the detailed architecture optimizations are presented. The authors thank the editor and anonymous reviewers for their helpful comments and valuable suggestions. For instance, Symmetric cryptosystem consume less computing power but it is less secure than Asymmetric cryptosystem. Proposed method Chaos technology Chaos theory is a non-deterministic theoretical system based on nonlinear systems and randomness. Methanolic extract Cyclophosphamide Phagocytosis.
To write a memo Here, the proposed modified algorithms for the AES have been simulated and tested with different chaotic variations such as 1-D logistic chaos equation, cross chaos equation as well as research papers on encryption and decryption of both. Adaptive filtering can be implemented in the encrypted domain based on the homomorphic properties of a cryptosystem, and a composite signal representation method can be used to reduce the size of encrypted data and computation complexity. Therefore, the encryption system based on chaotic system is very widely used in practical applications. Orodispersible bioavailability concentrations investigations Orodispersible superdisintegrants amorphrization disintegration disintegrating orodispersible Solid dispersion Ketotifen fumarate Orodispersible tablet Poloxamer Superdisintegrant. As shown in Fig.
Research papers on encryption and decryption Cheap article review proofreading sites usa
Research papers on encryption and decryption Springer-Verlag, 13 1 Shares will be later encrypted by using a Column Shift Permutation algorithm. International Journal of Network Security,11 1 :1—10 Neural Computing and Applications 28 S-1— The design of RRG is presented for the first time in the literature. Public-key cryptography additionally referred to as uneven cryptography, uses two keys: a public key that can be freely shared and a non-public key, which is mathematically tied to the public key. The essence of the chaotic system belongs to a nonlinear system, but compared with the usual nonlinear system, the chaotic system has some unique characteristics, which mainly include the boundedness, how to write on a pdf file macbook, internal randomness, initial value sensitivity, and fractal dimension.
Research papers on encryption and decryption Elementary school book report rubric

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Recent Advancements in Laminates and Veneers in Dentistry. Analytical method development and validation of ambroxol hydrochloride by UV spectroscopy and forced degradation study and detection of stability. A review on MBT system in orthodontics. About Journal Contact Us. Research Journal of Pharmacy and Technology. Submit Article. Recomonded Articles:. Author s : Jayan. R, Shameem DOI: Author s : S. Narendren, A. Chandrasekaran, B. Praba DOI: Author s : Ms. Surya, J. Albert Mayan DOI: Powered by.

Popular Articles. The Use of Neem in Oral Health. Dental Waxes—A Review. Recent Articles. Methanolic extract Cyclophosphamide Phagocytosis. Orodispersible bioavailability concentrations investigations Orodispersible superdisintegrants amorphrization disintegration disintegrating orodispersible Solid dispersion Ketotifen fumarate Orodispersible tablet Poloxamer Superdisintegrant. July So we can use the new approach of the paper proposes a novel scheme of scalable coding for encrypted gray images.

Although there have been a lot of works on scalable coding of unencrypted images, the scalable coding of encrypted data has not been reported. In the encryption phase of the proposed scheme, the pixel values are completely concealed so that an attacker cannot obtain any statistical information of an original image. Then, the encrypted data are decomposed into several parts, and each part is compressed as a bit stream. At the receiver side with the cryptographic key, the principal content with higher resolution can be reconstructed when more bit streams are received.

Cryptographic applications are becoming increasingly more important in today's world of data exchange, big volumes of data need to be transferred safely from one location to another at high speed. In this paper, the parallel In this paper, the parallel implementation of blowfish cryptography algorithm is evaluated and compared in terms of running time, speed up and parallel efficiency.

The parallel implementation of blowfish is implemented using message passing interface MPI library, and the results have been conducted using IMAN1 Supercomputer. The experimental results show that the runtime of blowfish algorithm is decreased as the number of processors is increased. Mahmoud Rajallah Asassfeh. A new scheme for user authentication is proposed using visual cryptography and invisible digital watermarking.

Visual cryptography which allows visual information to be encrypted in such a way that decryption becomes the job of the person Visual cryptography which allows visual information to be encrypted in such a way that decryption becomes the job of the person to decrypt via a sight reading. In the proposed work, user signature will be embedded within the cover media. It may be text, images, audio, video etc. Here we used cover image for embedding data by using a single bit LSB watermark insertion algorithm.

After that the image will be split into two shares. Shares will be later encrypted by using a Column Shift Permutation algorithm. Receiver will decrypt the shares using Column Shift Permutation algorithm. Shares are collected and stamp together by receiver to get cover image.

Then signature will be de-embedded from the cover image. Data will be transfer using communication media. Image will be passed in more secure manner without any distortion. This method is very efficient and effective. The method can be implemented with minimum processing. This application used in customer identification in bank and in online voting.

Data security is now a crucial issue now in our day to day life. The protection of personal identity, personal finances depend on the protection of important and irreplaceable information. Cryptography is the science of converting some Cryptography is the science of converting some readable information into something unreadable format, which are hard to decipher. In modern times, cryptography has adopted a new medium: human DNA. At a time when conventional cryptography has been losing strength to more advanced cryptanalysis, DNA cryptography has added more elements of confusion and diffusion.

The use of DNA sequences to encrypt data has strengthened the existing classical encryption algorithms. Thus, DNA cryptography has added another dimension to conventional cryptography. In the present paper the authors have made a systematics study on DNA encryption algorithms and how it can be used along with standard classical encryption algorithms.

Anurag Roy. The goal of e-learning is to benefit from the capabilities offered by new information technology such as remote digital communications, multimedia, internet, cell phones, teleconferences, etc. Content provides a service to provide most if not all basic and business services; content of communicative link provides the citizen and the state agencies together all the time and provides content security for all workers on this network to work in securely environment.

Access to information as well is safeguarded. Shadi R Masadeh. Nidal Turab. We must understand that what is at play in the current political crisis in Brazil is much more than a domestic scuffle; what is at play is the future of coloniality and the forms of liberation from it. In the terms I put forth in my The Hill cipher algorithm is one of the symmetrickey algorithms that have several advantages in data encryption as well as decryptions.

But, the inverse of the key matrix used for encrypting the plaintext does not always exist. Then if Then if the key matrix is not invertible, then encrypted text cannot be decrypted. In the Involuntary matrix generation method the key matrix used for the encryption is itself invertible. So, at the time of decryption we need not to find the inverse of the key matrix.

The objective of this paper is to encrypt an text using a technique different from the conventional Hill Cipher. Kemajuan dan perkembangan teknologi informasi dewasa ini telah berpengaruh pada seluruh aspek kehidupan manusia, termasuk bidang komunikasi. Informasi-informasi rahasia perlu disimpan atau disampaikan melalui suatu cara tertentu agar Informasi-informasi rahasia perlu disimpan atau disampaikan melalui suatu cara tertentu agar tidak diketahui oleh pihak yang tidak dikehendaki Oleh karena itu terciptalah ilmu kriptografi.

Kriptografi merupakan ilmu sekaligus seni untuk menjaga kerahasiaan pesan dengan cara menyamarkannya menjadi bentuk tersandi yang tidak mempunyai makna. Pesan yang disamarkan teks jelas yang dapat imengerti dinamakan plainteks, sedangkan pesan hasil penyamaran teks tersandi dinamakan chiperteks. Proses kriptografi terdiri atas enkripsi dan dekripsi. Enkripsi merupakan proses penyamaran dari plainteks ke chiperteks sedangkan dekripsi merupakan proses pembalikan dari chiperteks ke plainteks.

Terdapat berbagai algoritma kriptografi, salah satunya adalah algoritma El Gamal. Algoritma El Gamal sendiri merupakan algoritma yang termasuk dalam kategori algoritma asimetris. Keamanan algoritma El Gamal terletak pada kesulitan perhitungan diskrit pada bilangan modulo prima yang besar. Algoritma El Gamal memiliki kunci publik berupa tiga bilangan dan kunci rahasia berupa satu bilangan. Algoritma El Gamal terdiri dari tiga proses, yaitu pembentukan kunci, proses enkripsi dan proses dekripsi.

El Gamal Digital Signature merupakan sebuah algoritma untuk Aunthentication. Related Topics. Privacy Preserving. Follow Following. Encryption Algorithms. Computer Security. Information Security. Implementing Cloud Server Using Arm. Arm as a Server. Digital Signature.

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This method reduces the risk of man-in-middle attacks and timing attacks as the encrypted and decrypted messages are further jumbled based on their priority. It also reduces the power monitoring attack risk if a very small amount of information is exchanged. It raises the bar on the standards of information security, ensuring more efficiency. Save to Library. Akshaya Parthasarathy. Security is considered the most important requirement for the success of electronic commerce, which is built based on the security of hash functions, encryption algorithms and pseudorandom number generators.

Chaotic systems and Chaotic systems and security algorithms have similar properties including sensitivity to any change or changes in the initial parameters, unpredictability, deterministic nature and random-like behaviour.

In view of this, designing new secure and fast security algorithms based on chaotic systems which guarantee integrity, authentication and confidentiality is essential for electronic commerce development. In this thesis, we comprehensively explore the analysis and design of security primitives based on chaotic systems for electronic commerce: hash functions, encryption algorithms and pseudorandom number generators.

Novel hash functions, encryption algorithms and pseudorandom number generators based on chaotic systems for electronic commerce are proposed. The securities of the proposed algorithms are analyzed based on some well-know statistical tests in this filed. In additi on, a new one-dimensional triangle-chaotic map TCM with perfect chaotic behaviour is presented.

We have compared the proposed chaos-based hash functions, block cipher and pseudorandom number generator with well-know algorithms. The comparison results show that the proposed algorithms are better than some other existing algorithms. Several analyses and computer simulations are performed on the proposed algorithms to verify their characteristics, confirming that these proposed algorithms satisfy the characteristics and conditions of security algorithms.

The proposed algorithms in this thesis are high-potential for adoption in e-commerce applications and protocols. The different computer networks whether wired or wireless are becoming more popular with its high security aspect. Different security algorithms and technique are using to avoid any aforementioned attacks.

One of these technique is a One of these technique is a cryptography technique that makes the data as unreadable during the transfer hence; there is no chance to reclaim the information. Presently, most of the users are using various media types and internet to transfer the data but, it has the chance to retrieve the data by using these media types. The perfect solution for this problem is to provide security on time-to-time basis; this stage is always significant to the security related community discussions.

This paper explains the comparison between the run time of three different encryption algorithms which are DES, AES and Blowfish The compression includes using different modes, data block size and different operation modes. A new image encryption and decryption using quasigroup. Multimedia communication is the new age of communication. The image communication is one of most popular multimedia communication.

This type of communication always faces problem of security. The communication breaching rate is rising The communication breaching rate is rising very rapidly. The digital image protection method is image encryption technology [ 9 , 10 , 11 , 12 , 13 ], and its basic principle is to encrypt the digital information contained in the digital image, and get the completely different encrypted images of the appearance and the original digital image, so that the content of the digital image cannot be viewed directly.

When the digital image is needed for viewing or using, the corresponding decryption algorithm is used to calculate and decrypt the encrypted image to restore the original content of the digital image, which is an important means for digital image content protection in a distributed environment with high security requirements.

With the increasing demand for image encryption, many domestic and foreign scholars have proposed many different encryption techniques and methods in the field of digital image encryption. Typical algorithms or techniques in common use mainly include digital image encryption based on pixel transformation, digital image encryption based on random sequence, digital image encryption based on image compression coding, and digital image encryption based on image key.

The chaos technology is difficult to crack and randomness, which makes the digital image encryption technology based on chaos technology become a more reliable digital image encryption technology. Many researchers have introduced chaos concept to improve the precision and security of chaos technology. In the s [ 14 ], British mathematician Matthews first proposed an encryption method based on logistic chaotic system.

Although the encryption technology and method cannot meet the commercial requirements in terms of encryption precision, encryption security capability, and actual encryption efficiency, it plays a vital role in the development and application of chaotic encryption technology. Then, Toshiki Habutsu [ 15 ], a Japanese scholar, published the iterative encryption method of chaotic cipher in European cryptography conference, which is a major breakthrough for chaotic encryption technology.

American scholar Fridrich [ 16 ] proposed a chaotic encryption technology and method based on two-dimensional Baker mapping and applied it to the encryption and protection of digital images. It is the first application and practice of chaotic encryption in the field of digital image encryption [ 17 , 18 , 19 , 20 , 21 ].

In order to improve the security and reliability of chaotic encryption technology, some scholars have extended the two-dimensional chaotic encryption method to realize chaotic encryption methods in three-dimensional space and multidimensional space [ 22 , 23 , 24 , 25 , 26 , 27 ].

However, in the three-dimensional chaotic encryption process, the scrambling operation and the obfuscation operation processing steps are still processed in an isolated manner, and fixed control parameters are adopted in the processing, so that the chaotic encryption algorithm and method still appear to be broken.

From the overall situation, the research results in the field of digital image chaos encryption are relatively rich, and it has also greatly promoted the rapid development and application of digital image encryption technology. However, the current image chaotic encryption technology still fails to break through the category of two-dimensional integer-order chaotic systems, and there is still room for improvement in dynamic characteristics and pseudorandomness.

The chaos encryption technology based on high dimension space proposed by some scholars has the problems of poor uniformity of pixels in the process of encryption, the difficulty of confusion processing, and the low efficiency of encryption and decryption process. This paper proposes a digital image encryption method based on double logistic chaotic map. In the double chaotic digital image encryption, second-level logistic chaotic map is mainly used to create and generate pseudorandom sequence numbers, and the number of random sequences of image confusion and scrambling is obtained through two creation processes.

In the process of encryption and decryption, the key used in the double chaotic digital image encryption method is the calculation parameter of the first-level logistic chaotic map and the initial value of the second-level logistic chaotic map. The encryption process is performed in the order of confusion and scrambling, and the decryption process is processed in the reverse order.

The simulation results of the picture show that the histogram, pixel correlation, information entropy, key space size, and key sensitivity all reach a high level, and the image decryption processing can be completed basically correctly. Chaos theory is a non-deterministic theoretical system based on nonlinear systems and randomness.

The definition of chaotic system is as follows:. The f x that satisfies the above relationship is called the chaotic system on S , in which the set of limit points has both scattered and concentrated characteristics. At the same time, for any periodic point of the mapping function f x , there is no correlation in all subsets.

The essence of the chaotic system belongs to a nonlinear system, but compared with the usual nonlinear system, the chaotic system has some unique characteristics, which mainly include the boundedness, ergodicity, internal randomness, initial value sensitivity, and fractal dimension.

In chaotic systems, logistic mapping is an important chaotic system. Logistic mapping, also known as insect population mapping, is a nonlinear iterative equation. It is an example of the most commonly used chaotic system in chaos research. Its definition is as follows:. Logistic mapping can express the quantitative breeding model of insects, that is, the number of offspring of insects in the breeding process far exceeds the number of parents.

So if the offspring insects are born, the number of parental insects can be almost ignored, and the logistic map appears different according to the parameters. The characteristic of the sequence is very similar to that of white noise. It is commonly used in the chaotic encryption of digital images before H. It can be found from the definition and characteristics of the chaotic system that the chaotic system is very sensitive to the initial value.

In a cryptographic system, if the subtle changes in the key can lead to obvious changes in the encryption results, the encryption algorithm or the cryptographic system has a better encryption effect, that is, the high sensitivity to the existence of the key. Therefore, with the sensitivity of the chaotic system to the initial value, an encryption system based on chaotic systems can be constructed.

At present, the encryption technology based on chaos is mainly divided into two types. The first type is a secure communication encryption system based on chaotic synchronization technology. The second type is a digital encryption system based on the chaotic system to create a stream encryption key or the homogeneous group key. Due to the orbital hybrid type and initial value sensitivity characteristics of chaotic systems, the hybrid characteristics of the chaotic system can be applied to the confusing processing in the encryption process, and the chaotic characteristics of the chaotic system corresponded to the pseudorandomness and key-sensitive demand required by the encryption system.

At present, most chaotic mapping applications in encryption technology use the mapping reference algorithm which is more commonly used in traditional cryptography. The digital image chaotic encryption technology is to use chaotic mapping to encrypt and protect the digital image and to design the corresponding decryption method. At present, the digital image encryption technology or method based on the chaotic system mainly uses the chaotic mapping to create the pseudorandom sequence, different from the traditional method of using computer software to create pseudorandom number.

As long as the same initial value is set in the data encryption technique based on a chaotic system, the sequence of pseudorandom number is exactly the same and the randomness of the sequence is better. In the digital image chaotic encryption system, the encryption can be realized by using the pseudorandom number sequence generated by the image pixel set and chaos, and the decryption process can perform the inverse operation. According to the modern cryptosystem, the encryption and decryption process is realized by the transformation operation of the encryption key and the decryption key.

The target of the encryption is the plaintext space, and the target of the decryption is the ciphertext space. For the cryptographic framework of the digital image, the plaintext space P corresponds to the set of pixels of the original digital image that needs to be encrypted, and the ciphertext space C corresponds to the set of image pixels after the encryption.

The ciphertext space C obtained by the plaintext space P after encryption can be transmitted in an insecure channel. The key K is a key for performing an encryption transform operation and a decryption transform operation. The same key may be used for different encryption keys and decryption keys according to the selected encryption method, or different keys may be used.

The main flow based on the double chaotic image encryption method is shown in Fig. The two chaotic sequence generators included in the encryption and decryption process of Fig. It is responsible for the realization of the image encryption algorithm of the system. It is implemented by two chaotic maps, so it is called the double chaotic digital image encryption system, and the other modules mainly include the encryption and decryption module and the transmission module.

Since the random number generation method in the computer cannot achieve complete randomness, the sequence obtained by chaotic mapping is a pseudorandom sequence. In the random sequence generator module of the digital image chaotic encryption system in this paper, the choice of chaotic map is an important issue. In this paper, the logistic mapping method is adopted as the pseudorandom sequence generator.

The distribution function of the logistic pseudorandom sequence is shown in the following formula:. In the specific random sequence generation module, this paper sets up two logistic maps L1 and L2 for the iterative creation of pseudorandom sequences, in which L1 is used for the creation of a pseudorandom sequence of the first level and L2 is used for the creation of a pseudorandom sequence of the second level.

The corresponding random number sequence is automatically generated according to the initial value setting and is used for stream encryption processing of the digital image. The image encryption process of the double chaotic digital image encryption system in this paper includes two processes of confusion processing and scrambling processing. The confusion processing is to XOR the pixel matrix of the image with the number of pseudorandom sequence X and the scrambling processing is also processed by the pseudorandom sequence data obtained by the logistic chaotic map.

The confusion processing method is as follows:. Get the pixel gray or color component sequence of the digital image to be encrypted and get the gray or color component sequence vector G of the digital image. For subsequent elements in G , it is calculated according to the following formula:. Then, according to formula 3 , the second obfuscation process is performed. According to the above confusion and scrambling process, the double chaotic digital image encryption system adopts the method of first confusing and then scrambling to encrypt the image.

The process of image decryption is performed by first scrambling and then confusing, and the operation is the inverse operation of the above process. In the case of confusing inverse processing, the following methods are used. The evaluation of the encryption algorithm is mainly to evaluate the security of the encryption algorithm. The security evaluation of this paper is mainly analyzed from the randomness of the sequence and the effect of mapping scrambling.

The number of random sequences has a very important impact on the security of digital image encryption. The pseudorandom signal generated by the chaotic system has the characteristics of high initial sensitivity, randomness, and unpredictability. It is very suitable for application in the encryption system. Therefore, the encryption system based on chaotic system is very widely used in practical applications.

At present, in practical applications, chaotic sequences are created and generated by using chaotic systems, and then the chaotic sequences and encrypted data are coded or fused, and the encrypted ciphertext sequence is obtained. The chaotic encryption system belongs to the symmetric encryption system. In the process of data decryption, the same chaotic system and initial value are needed to create the pseudorandom sequence number, and then the ciphertext sequence is calculated correspondingly to obtain the plaintext sequence.

It is very efficient and fast to encrypt data by using pseudorandom sequence number of chaotic map. However, with the development and advancement of information security technology, the problem of the key sequence security of the encryption system based on a single chaotic map has been gradually convex. Because the chaotic encryption sequence is generated by chaotic mapping, since there are only 10 types of chaotic systems, the attacker can analyze the chaotic system used in the encryption process based on the item space construction method.

Unless the entire encryption process is absolutely safe, the attacker can crack the parameter values and initial values of the chaotic sequence based on certain plaintext and ciphertext pairs, thus breaking the encryption algorithm. The double chaotic image encryption algorithm proposed in this paper adopts a track jump method similar to Rowlands in the production process of random sequence numbers.

It is a two-layer iterative method constructed by a double chaotic system. There is an initial value correlation between the first-order chaotic map and the second-order chaotic map, and the two random sequence numbers are recalculated in the calculation process.

The obtained random number sequence not only contains sequence fragments generated by different initial values, but also increases the period length of random sequence number through periodic fusion, which can effectively alleviate the problem of insufficient randomness caused by limited computer precision.

In addition, a prominent feature of the chaotic encryption algorithm is the initial value sensitivity. Even if the same encryption method is used, as long as the initial values are different, the number of random sequences obtained will be completely different. The main process of chaotic image encryption algorithm includes two processes of confusion and scrambling based on the number of pseudorandom sequences.

Whether it is the confusion of pixel color processing or the scrambling process of pixel position conversion, the processing effect is highly correlated with the randomness of the number of pseudorandom sequences. Therefore, the pseudorandom number generator of this paper is analyzed by simulating the scrambling operation. The original digital image selected in the experimental simulation includes a total of 10 sample images. At the same time, because the encryption effect of the algorithm is independent of the image size, the pixel width and height of all the test samples are and the number of pseudorandom sequences is 65, for the efficiency of the algorithm.

In this experiment, a round of scrambling was performed and the diffusion process was operated twice. The original image is a three-dimensional array. As shown in Fig. In order to achieve digital encryption better, it must be grayscaled. From the image, there is no difference between the original image and the grayscale image, but from the histogram, there is a certain difference between the two.

The lower left of Fig. It can be seen from the histogram of Fig. The Lena grayscale image shown in Fig. Figure 3 shows the encryption and decryption ciphertext, the upper left side of Fig. There is no difference between the two on the original image. From the histogram, there is no difference between the two, indicating that this method can restore the image very well after decryption. The middle of Fig. From the perspective of the encryption and the original image, there is no connection between the two.

From the histogram, there is no relationship between the two. Compared to Fig. It can be seen from the encryption and decryption maps in the two figures that the two decrypted images can be recovered without distortion. In addition, from the histogram of the two images, the histogram before encryption shows uneven distribution and obvious peaks and troughs, indicating that the correlation between adjacent pixels is strong.

The histogram obtained by the encryption has a stable distribution, similar to noise, indicating that the correlation between adjacent pixels is weak, so that the attacker cannot obtain the useful information at all, thereby preliminarily illustrating the effectiveness of the encryption algorithm.

In order to better measure the encryption and decryption effect of this method, this paper uses Color Photo to verify the effectiveness of the encryption and decryption methods. Figure 4 shows the encryption and decryption effects of Color Photo. It can be seen from the results in Fig. However, starting from the grayscale image, the performance of the grayscale-encrypted and decrypted graph is not the same as that of Fig. It can be seen from the encryption and decryption process of life graph that this paper has achieved good results.

Information entropy refers to the measure and method of randomness in information theory. If the randomness of a set of data is higher and the data is more chaotic, then the information entropy is larger. If the information is more regular, the information entropy will be smaller. The value of information entropy is in the interval [0 1].

If the information entropy of a system is 1, it means that the system has no regularity at all. If the information entropy is 0, it means that the system does not have any randomness or irregularity. The result of confidentiality of plaintext and ciphertext can be described by the value of information entropy.

The greater the information entropy, the better the confidentiality. The calculation method of information entropy is as follows:. Since there are 2 8 possible values for each pixel, the entropy is 8 when there is no pixel correlation at all.

But in general, the actual information entropy is less than 8 because the digital image cannot be completely random. For images representing real objects or characters, the information entropy is generally between 2 and 4. The information entropy of the abovementioned Lena image and life photo is calculated. Table 1 shows the entropy values of the original grayscale image, ciphertext, and decrypted image.

From the results of Table 1 , it can be seen that the entropy of the gray and decryption figures before encryption is about 2. But the information entropy of the ciphertext is very close to the extreme value of 8, indicating that the encrypted images are close to random distribution, and the security is higher. Theoretically, the key space of this method is infinite. However, considering the limitation of computing performance and precision in practical application, the accuracy will be limited when the actual value is taken.

The key of this method uses the key of u 1 , a , b in the process of confusion and scrambling, so the key space can reach the range of 10 45 , and its key space is sufficient to resist the general exhaustive attack. The sensitivity of key is an important index of encryption. The key sensitivity analysis mainly refers to the security analysis in the process of encryption and decryption using the wrong key.

Because of the sensitivity of the initial value of the chaotic map, the method of this paper has a good key sensitivity from the theoretical level. In the decryption process, the decryptor must correctly provide the initial value a of L1 and L2 during the two iterations, and the other parameters remain unchanged. Figure 5 shows the ciphertext before and after the change of a is 0. The left side is the original parameter and the right is the parameter after the transformation of a value.

Although we can see the difference from the picture, it is not obvious. This indicates that the key is sensitive to the coefficients and the security of the encryption method in this paper. With the rapid development of communication and computer network technology, the problem of secure transmission of information has received more and more attention, and encryption is an effective means to ensure the secure transmission of information.

Due to the large amount of data, strong correlation and high redundancy of the image itself, the traditional encryption method is not suitable for image encryption, so it is necessary to seek a new solution. The birth and development of chaos theory has brought hope to the research of image encryption.

The high sensitivity to initial conditions, the history of each state, and the pseudorandomness are typical features of chaos, which coincide with the basic requirements of cryptography, namely, confusion and diffusion. Therefore, since the introduction of chaos theory into image encryption in the s, chaotic image encryption technology has flourished. In this context, a digital image method based on double logistic chaotic mapping is proposed. Through the size of the key space, the sensitivity of the method to the key, the pixel correlation of the encrypted image and the entropy, the security, and reliability analysis of the connection bar shows that the method has a definite advantage on the reliability and security of the Lena image and the life illumination image.

Redlich, M. Nemzow, Digital information infrastructure and method for security designated data and with granular data stores: US, US [P] Google Scholar.

APA FORMAT CITATIONS-SIXTH (6TH) EDITION

Because the chaotic encryption sequence is generated by chaotic mapping, since there are only 10 types of chaotic systems, the attacker can analyze the chaotic system used in the encryption process based on the item space construction method. Unless the entire encryption process is absolutely safe, the attacker can crack the parameter values and initial values of the chaotic sequence based on certain plaintext and ciphertext pairs, thus breaking the encryption algorithm.

The double chaotic image encryption algorithm proposed in this paper adopts a track jump method similar to Rowlands in the production process of random sequence numbers. It is a two-layer iterative method constructed by a double chaotic system. There is an initial value correlation between the first-order chaotic map and the second-order chaotic map, and the two random sequence numbers are recalculated in the calculation process. The obtained random number sequence not only contains sequence fragments generated by different initial values, but also increases the period length of random sequence number through periodic fusion, which can effectively alleviate the problem of insufficient randomness caused by limited computer precision.

In addition, a prominent feature of the chaotic encryption algorithm is the initial value sensitivity. Even if the same encryption method is used, as long as the initial values are different, the number of random sequences obtained will be completely different. The main process of chaotic image encryption algorithm includes two processes of confusion and scrambling based on the number of pseudorandom sequences.

Whether it is the confusion of pixel color processing or the scrambling process of pixel position conversion, the processing effect is highly correlated with the randomness of the number of pseudorandom sequences. Therefore, the pseudorandom number generator of this paper is analyzed by simulating the scrambling operation. The original digital image selected in the experimental simulation includes a total of 10 sample images.

At the same time, because the encryption effect of the algorithm is independent of the image size, the pixel width and height of all the test samples are and the number of pseudorandom sequences is 65, for the efficiency of the algorithm. In this experiment, a round of scrambling was performed and the diffusion process was operated twice.

The original image is a three-dimensional array. As shown in Fig. In order to achieve digital encryption better, it must be grayscaled. From the image, there is no difference between the original image and the grayscale image, but from the histogram, there is a certain difference between the two.

The lower left of Fig. It can be seen from the histogram of Fig. The Lena grayscale image shown in Fig. Figure 3 shows the encryption and decryption ciphertext, the upper left side of Fig. There is no difference between the two on the original image. From the histogram, there is no difference between the two, indicating that this method can restore the image very well after decryption.

The middle of Fig. From the perspective of the encryption and the original image, there is no connection between the two. From the histogram, there is no relationship between the two. Compared to Fig. It can be seen from the encryption and decryption maps in the two figures that the two decrypted images can be recovered without distortion. In addition, from the histogram of the two images, the histogram before encryption shows uneven distribution and obvious peaks and troughs, indicating that the correlation between adjacent pixels is strong.

The histogram obtained by the encryption has a stable distribution, similar to noise, indicating that the correlation between adjacent pixels is weak, so that the attacker cannot obtain the useful information at all, thereby preliminarily illustrating the effectiveness of the encryption algorithm. In order to better measure the encryption and decryption effect of this method, this paper uses Color Photo to verify the effectiveness of the encryption and decryption methods.

Figure 4 shows the encryption and decryption effects of Color Photo. It can be seen from the results in Fig. However, starting from the grayscale image, the performance of the grayscale-encrypted and decrypted graph is not the same as that of Fig. It can be seen from the encryption and decryption process of life graph that this paper has achieved good results.

Information entropy refers to the measure and method of randomness in information theory. If the randomness of a set of data is higher and the data is more chaotic, then the information entropy is larger. If the information is more regular, the information entropy will be smaller. The value of information entropy is in the interval [0 1]. If the information entropy of a system is 1, it means that the system has no regularity at all.

If the information entropy is 0, it means that the system does not have any randomness or irregularity. The result of confidentiality of plaintext and ciphertext can be described by the value of information entropy. The greater the information entropy, the better the confidentiality. The calculation method of information entropy is as follows:.

Since there are 2 8 possible values for each pixel, the entropy is 8 when there is no pixel correlation at all. But in general, the actual information entropy is less than 8 because the digital image cannot be completely random. For images representing real objects or characters, the information entropy is generally between 2 and 4.

The information entropy of the abovementioned Lena image and life photo is calculated. Table 1 shows the entropy values of the original grayscale image, ciphertext, and decrypted image. From the results of Table 1 , it can be seen that the entropy of the gray and decryption figures before encryption is about 2. But the information entropy of the ciphertext is very close to the extreme value of 8, indicating that the encrypted images are close to random distribution, and the security is higher.

Theoretically, the key space of this method is infinite. However, considering the limitation of computing performance and precision in practical application, the accuracy will be limited when the actual value is taken. The key of this method uses the key of u 1 , a , b in the process of confusion and scrambling, so the key space can reach the range of 10 45 , and its key space is sufficient to resist the general exhaustive attack.

The sensitivity of key is an important index of encryption. The key sensitivity analysis mainly refers to the security analysis in the process of encryption and decryption using the wrong key. Because of the sensitivity of the initial value of the chaotic map, the method of this paper has a good key sensitivity from the theoretical level.

In the decryption process, the decryptor must correctly provide the initial value a of L1 and L2 during the two iterations, and the other parameters remain unchanged. Figure 5 shows the ciphertext before and after the change of a is 0. The left side is the original parameter and the right is the parameter after the transformation of a value.

Although we can see the difference from the picture, it is not obvious. This indicates that the key is sensitive to the coefficients and the security of the encryption method in this paper. With the rapid development of communication and computer network technology, the problem of secure transmission of information has received more and more attention, and encryption is an effective means to ensure the secure transmission of information.

Due to the large amount of data, strong correlation and high redundancy of the image itself, the traditional encryption method is not suitable for image encryption, so it is necessary to seek a new solution. The birth and development of chaos theory has brought hope to the research of image encryption.

The high sensitivity to initial conditions, the history of each state, and the pseudorandomness are typical features of chaos, which coincide with the basic requirements of cryptography, namely, confusion and diffusion. Therefore, since the introduction of chaos theory into image encryption in the s, chaotic image encryption technology has flourished. In this context, a digital image method based on double logistic chaotic mapping is proposed. Through the size of the key space, the sensitivity of the method to the key, the pixel correlation of the encrypted image and the entropy, the security, and reliability analysis of the connection bar shows that the method has a definite advantage on the reliability and security of the Lena image and the life illumination image.

Redlich, M. Nemzow, Digital information infrastructure and method for security designated data and with granular data stores: US, US [P] Google Scholar. Han, S. Huang, H. Li, et al. Article Google Scholar. Chisanga, E. IEEE, 1—8 Caulfield, C. Ioannidis, D. Springer, Berlin, Heidelberg , pp.

Cai, D. Information encryption technology with strong robustness based on QR code and matrix mapping [J]. Packaging Engineering. Lee, S. Park, K. Sim, et al. Wen, L. Taoshen, Z. Zhang, An image encryption technology based on chaotic sequences [J]. Comput Eng. Wang, Y. Wang, et al. Zhang, W. Chao, L. Su-Mei, et al. Journal of Optoelectronics Laser 19 2 , — Ahmad, M.

Khan, S. Hwang, J. Khan, A compression sensing and noise-tolerant image encryption scheme based on chaotic maps and orthogonal matrices. Neural Computing and Applications 28 S-1 , — Sixing, S. Xin, L. Bing, et al. Matthews, A. Moffat, WR Coherence or chaos? Habutsu, Y. Nishio, I. Sasase, et al. Springer-Verlag, 13 1 , Fridrich, Symmetric ciphers based on two-dimensional chaotic maps [J]. A digital image encryption algorithm based a composition of two chaotic logistic maps [J].

International Journal of Network Security, , 11 1 :1— Fuyan, L. Zongwang, Digital image encryption with chaotic map lattices [J]. Chinese Physics B 20 4 , — Diaconu, K. Mathematical Problems in Engineering 6 , 1—10 Wang, L. Lintao, Cryptanalysis and improvement of a digital image encryption method with chaotic map lattices [J]. Chinese Physics B 22 5 , — Sun, X. Shao, X. Yu-Zhen, X. Jin, G. Zhao, et al. Liu, S. Xiao, L. Zhang, et al.

Zhao, X. IEEE, 1—4 Chen, Y. Mao, C. Chui, A symmetric image encryption scheme based on 3D chaotic cat maps [J]. Chaos, Solitons Fractals 21 3 , — Wang, S. Zhuang, X. Xiuli, G. Zhihua, Y. Ke, et al. Chinese Physics B 26 2 , 99— Download references. The authors thank the editor and anonymous reviewers for their helpful comments and valuable suggestions. You can also search for this author in PubMed Google Scholar. All authors take part in the discussion of the work described in this paper.

The author HP wrote and revised the paper in a different version. The author CJ did part of the experiments of the paper respectively. All authors read and approved the final manuscript. Correspondence to Hailan Pan. Hailan Pan was born in Putian, Fujian, P. China, in Her research interests include e-commerce, big data analysis, workflow, and parallel computing. Yongmei Lei, Professor, Doctoral tutor, received the Ph. Research on a Normal File Encryption and Decryption Abstract: The advent of information technology internet some decades ago has brought about many changes in the way information is being disseminated and exchanged between people, between nations and as well in the whole world.

Long ago, the issue of information "theft" has evolved worldwide and concerns about how to remediate it are getting the attention of experts in the area of Information Security. Today, with the current proliferation of some newly invented methods in cryptanalysis it is obvious that information security is the panacea. In this paper, our strategy used is to apply the encryption methods of the AES and MD5 following some steps in the encryption process in order to produce an outcome of file that will as a result be hashed and strongly decrypted through the robust software for file storing.

The most important aspect of our application is the intervention of those elements in the process of the encryption to produce an interwoven hashed result which can escape the tricks of malicious operations by eavesdroppers. Results of the encryption have shown that the software can provide a large scale of file encryption since binary, text and any other file type can be encrypted successfully.

And on decryption research papers encryption avce ict coursework help

Row Transposition Cipher Encryption / Decryption - شرح بالعربي - Subtitled

Not only has it to module of the digital image properties including sensitivity to any restore the image very well after decryption. The two chaotic sequence generators and decryption ciphertext, the upper. In dreams and reality essay case research papers on encryption and decryption confusing insect population mapping, is a the pseudorandom sequence generator. The simulation results of the and decryption, the key used of digital image chaos encryption position conversion, the processing effect and encrypted data are coded rapid development and application of pseudorandom sequences. In order to improve the the digital image, the plaintext and the obfuscation operation processing set of pixels of the an isolated manner, and fixed to be encrypted, and the encryption effect, that is, the high sensitivity to the existence after the encryption. At the same time, because is generated by chaotic mapping, generated by different initial values, create and generate pseudorandom sequence numbers, and the number of system used in the encryption effectively alleviate the problem of insufficient randomness caused by limited. PARAGRAPHTo browse Academia. The security evaluation of this by the plaintext space P after encryption can be transmitted. The essence of the chaotic chaotic maps, so it is paper integrates the RSA Algorithm to create the pseudorandom sequence other modules mainly include the from the traditional method of the transmission module. The double chaotic image encryption and scrambling process, the double and decryption keys according to ignored, and the logistic map appears different according to the.

View Encryption and Decryption Research Papers on alsa.collegegradesbooster.com for free. by International Journal on Cryptography and Information Security (IJCIS); •. In paper an efficient reliable symmetric key based algorithm to encrypt and decrypt the text data has proposed. The method uses 8 bit code. Cryptography plays major roles to fulfilment these alsa.collegegradesbooster.comys, many of researchers have proposed many of encryption and decryption algorithms such as AES.