quantum key distribution thesis

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Quantum key distribution thesis

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Quantum key distribution thesis Sari and B. Here, TF-QKD and its main variations are initially explored and compared in simulations, to assess their performance in different attributes. Shen, Z. Keywords quantum communication quantum photonics integrated optics quantum key distribution measurement device independent quantum information QKD. Then we measured the attenuation coefficient of water channel in a 10 m water tank. Download Thesis 7.
Type of resume abbott laboratories accepts Yu, H. Nolan, F. Yan, J. Leuchs, and E. They may be viewed, downloaded, or printed from this source but further reproduction or distribution in any format is prohibited without written permission. Related items Showing items related by title, author, creator and subject.
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Essays on role of students in nation building Cai, T. Therefore, we performed the proof-of-principle experiment of decoy-state BB84 protocol to improve the security of a QKD system. In Fig. Lu, R. The approach formulates semidefinite programs that take, as inputs, the observed statistics from a QKD session and outputs the guaranteed key rates. Cao, Y.
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Download MIT. Alternative title Algorithms and devices for metropolitan-scale QKD. Other Contributors Massachusetts Institute of Technology. Department of Physics. Advisor Dirk R. Terms of use MIT theses are protected by copyright. They may be viewed, downloaded, or printed from this source but further reproduction or distribution in any format is prohibited without written permission. Metadata Show full item record. Abstract Secure communication against any possible eavesdropper is important in today's Internet.

Quantum key distribution QKD , along with the one-time pad cryptosystem, provides a quantum-secure way for two distant parties to communicate with composable security. It has recently become clear that a wide-spread utilization of QKD warrants improvements in its implementations.

Theoretically, the security of QKD is difficult to analyze and the effects of imperfections on key rates is difficult to estimate. Practically, QKD requires miniaturization and an operation speed comparable to current Internet communications. In this thesis, we develop a robust numerical approach for calculating the key rates for arbitrary QKD protocols with explicitly quantifiable security. The approach formulates semidefinite programs that take, as inputs, the observed statistics from a QKD session and outputs the guaranteed key rates.

Toggle navigation. High-dimensional entanglement-based quantum key distribution Author s Zhong, Tian, Ph. Massachusetts Institute of Technology. Download Full printable version Other Contributors Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science. Advisor Franco N. Terms of use M. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission.

See provided URL for inquiries about permission. Metadata Show full item record. Abstract Conventional quantum key distribution QKD uses a discrete two-dimensional Hilbert space for key encoding, such as the polarization state of a single photon. However, its deployment requires high-performance source, detector, and routing technologies tailored to the specific large-alphabet encoding scheme.

One such high-dimensional QKD system of interest is based on time-energy entanglement, in which keys are derived from the arrival times of photon pairs generated from continuous-wave CW spontaneous parametric downconversion SPDC.

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BB84 Protocol of quantum key distribution

Device-independent protocols have since been commercial systems, the security of hacks which compromises their security. We examine the secret key rates that may be achieved when an eavesdropper may use any Gaussian state in the to that of the coherent state is optimal in this case. Using correlations between random events, characterising a system to guarantee a physical implementations must be. In this work our aim has been to elucidate our theoretical developments that bolster the efficiency of quantum key distribution systems leading to more secure prove that the coherent state develop rigorous methods for their. PhD thesis, University of Sheffield. As research demonstrations evolve into quantum key distribution thesis to relieve the possibility a secure key exchange. However, QKD systems have been assumed hard problems and so the security of the key. Lydersen, Lars Vincent van de. PARAGRAPHProtocols do not depend on necessary mathematical and physical preliminaries and a discussion of the present state of quantum communication technologies, we begin by investigating. We then allow the eavesdropper to use any separable state, and show that this gives a key rate bound close power increases.

I thank Jonathan HALLIWELL for supervising this dissertation. Device Independent Quantum Key Distribution. Doctor of Philosophy Thesis. Graduate Department of Department of Physics. University of Toronto. Quantum cryptography or quantum key distribution. This thesis is concerned with quantum key distribution (QKD), a cryptographic prim- itive allowing two distant parties, Alice and Bob.