Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 55 for “"Quantum cryptography"”.
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RELATIVISTIC QUANTUM CRYPTOGRAPHY
… the benefits of relativistic constraints for cryptography. We first revisit non-communicating models and its applications in the context of interactive proofs and cryptography. We propose bit commitment protocols whose security hinges on communication constraints and investigate its …
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Applications of Quantum Cryptography
This thesis extends the applicability of quantum cryptography. First, we prove that quantum cryptography at least equals classical cryptography in an important area, namely authentication. The quantum key distribution protocols presented here show that, contrary to previous belief, authentication …
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Quantum Cryptography Beyond Qubits
Over the last few decades, quantum cryptography has been one of the most important quantum technologies developed. It holds the promise of communicating secure information over untrusted channels. In particular, quantum cryptography is immune to the eventual threats posed by large-scale quantum …
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Quantum Cryptography: From Theory to Practice
Quantum cryptography or quantum key distribution (QKD) applies fundamental laws of quantum physics to guarantee secure communication. The security of quantum cryptography was proven in the last decade. Many security analyses are based on the assumption that QKD system components are idealized. In …
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Security Protocols in Relativistic Quantum Cryptography
This thesis explores quantum cryptographic protocols designed to provide secure implementation of three key tasks, through mathematical analysis and qualitative discussion. Each chapter focuses on a distinct cryptographic scheme and explores its utility relative to classical and alternative quantum …
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Architectures for Code-based Post-Quantum Cryptography
L'abstract è presente nell'allegato / the abstract is in the attachment
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Tomographic quantum cryptography with bell diagonal states
… thesis, a generalized version of the Tomographic Quantum Key Distribution protocol in which the two users Alice and Bob share a Bell diagonal mixed state of two qubits will be presented and its security analyzed. In particular, it will be shown that if an eavesdropper performs a coherent …
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Quantum cryptography : security analysis of multiuser quantum communication with embedded authentication
Three quantum cryptographic protocols of multiuser quantum networks with embedded authentication, allowing quantum key distribution or quantum direct communication, are discussed in this work. The security of the protocols against different types of attacks is analysed with a focus on various …
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Design and Analysis of Hardware-Based Scheduler and Multi-Photon Quantum Cryptography Protocol
Quantum cryptography is gaining more attentions in recent years. In this dissertation, a multi-photon quantum cryptography method is analyzed to take into account the fiber loss and collective-rotation noise. Compared with single photon protocols, the multi-photon protocol has longer transmission …
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FPGA Implementation and Optimization of Bit Flipping Key Generation Algorithm for Post Quantum Cryptography in Embedded Systems Applications
The expeditious advancement of quantum computing has created a threat to classic cryptographic systems, calling for post-quantum cryptography (PQC) solutions like Bit Flipping Key Encapsulation (BIKE) algorithm, which utilizes Quasi-Cyclic Moderate Density Parity-Check (QC-MCPC) codes for a secure …
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Practicality of Quantum Information Processing
Quantum Information Processing (QIP) is expected to bring revolutionary enhancement to various technological areas. However, today's QIP applications are far from being practical. The problem involves both hardware issues, i.e., quantum devices are imperfect, and software issues, i.e., the …
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Verifying Correctness of the Number Theoretic Transform and Fast Number Theoretic Transform in F⋆
… and has recently gained importance in post-quantum cryptography. This thesis presents a proof of correctness of the NTT in F⋆ , a proof-oriented programming language that extracts to OCaml, and shows that we can use the NTT to perform polynomial multiplications. We provide an implementation …
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Relativistic Quantum Tasks
Quantum mechanics, which describes the behaviour of matter and energy on very small scales, is one of the most successful theories in the history of science. Einstein's theory of special relativity, which describes the relationship between space and time, is likewise a highly successful and widely …
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The study of entangled states in quantum computation and quantum information science
… thesis explores the use of entangled states in quantum computation and quantum information science. Entanglement, a quantum phenomenon with no classical counterpart, has been identified as an important and quantifiable resource in many areas of theoretical quantum information science, including …
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Quantum information applications of frequency upconversion
… upconversion in a non-linear crystal for quantum information applications. By combining a bright “escort” beam with a signal photon inside of a periodically poled lithium niobate (PPLN) crystal, we are able to achieve near unit conversion efficiency. We use this conversion process to …
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Photon Arrival Time Quantum Random Number Generation
A quantum random number generator (QRNG) is one which re- lies on a physical process, extracting randomness from the inherent uncertainty in quantum mechanics. This is to be contrasted with current pseudo-random number generators (PRNG), which although useful, are in fact deterministic: they always …
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Efficient Algorithms, Protocols and Hardware Architectures for Next-Generation Cryptography in Embedded Systems
… and energy-efficient embedded implementations of cryptography, especially public key algorithms. The research presented in this thesis demonstrates the design, implementation and experimental validation of efficient next-generation cryptography for embedded systems using software optimization, …
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CRYSTAL STRUCTURE ENGINEERING FOR IMPROVED PERFORMANCE OF EMERGING NANOSCALE DEVICES
… near-field photolithography, free-space quantum cryptography, consumer displays, quantum computation, as well as diagnostic medicine and imaging. However, only few theoretical investigations have been performed on these structures due to the complex nature of the interplay of atomicity, …
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Development of the Visible Light Photon Counter for Applications in Quantum Information Science
… visible light photon counter (VLPC) is a high quantum efficiency (QE), Si-based, single-photon detector with high gain, low-noise multiplication, low timing jitter, and photon number resolution. While the VLPC has high QE in the visible wavelengths, the QE in the ultraviolet and infrared is low …
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