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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 63 for “"Quantum key distribution"”.
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Optically Switched Quantum Key Distribution Network
… is vital to modern communication networks. Quantum Key Distribution (QKD) is a promising method based on the quantum properties of light to generate and distribute unconditionally secure keys for use in classical data encryption. Significant progress has been achieved in the performance of …
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Integrated optical components for quantum key distribution
The security of current public key cryptosystems, such as RSA, depends on the difficulty of computing certain functions known as trapdoor functions. However, as computational resources become more abundant with the fast development of super- and quantum computers, relying on such methods for …
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A multi-protocol quantum key distribution transmitter
Quantum key distribution (QKD) is a technology that allows two users to communicate with theoretically perfect security using standard optical fibres. This is possible by transmitting the key on single photons, meaning a measurement by an eavesdropper disturbs the system in a way observable to the …
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High-dimensional entanglement-based quantum key distribution
Conventional quantum key distribution (QKD) uses a discrete two-dimensional Hilbert space for key encoding, such as the polarization state of a single photon. In contrast, high-dimensional QKD allows encoding onto a larger state space, such as multiple levels of a continuous variable of a single …
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Soft Processing Techniques for Quantum Key Distribution Applications
… information reconciliation and data sifting for Quantum Key Distribution (QKD). A novel composite channel model for QKD is identified, which includes both a hard output quantum channel and a soft output classic channel. The Log-Likelihood Ratios, - also called soft-metrics - derived from the two …
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High-dimensional Quantum Key Distribution with Frequency Encoding
… is a quintessential resource for emerging quantum technologies. In this thesis, we harness this resource for applications such as quantum communication and quantum networking. In the first part of this thesis, we demonstrate an indistinguishable heralded single-photon source, featuring …
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Quantum key distribution beyond the repeaterless secret key capacity
Quantum communications promise to provide information theoretic security in the exchange of information. However, unlike their classical counterpart, they utilise dim optical pulses whose amplification is prohibited. Consequently, their transmission rate and range is confined below a theoretical …
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Quantum key distribution protocols with high rates and low costs
… security has been paid great attention recently. Quantum key distribution is a hot research topic for physical layer security in the two decades. This thesis focuses on two quantum key distribution protocols that can potentially increase the key generation rate and lower the cost. On protocol is …
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Protocols and Resources for New Generation Continuous Variable Quantum Key Distribution
Quantum optics has been developing into a promising platform for future generation communications protocols. Much of this promise so far has come from the development of quantum key distribution (QKD). The majority of the development of QKD is done with discrete variables (DV), i.e. qubits with the …
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Protocols and Resources for New Generation Continuous Variable Quantum Key Distribution
Quantum optics has been developing into a promising platform for future generation communications protocols. Much of this promise so far has come from the development of quantum key distribution (QKD). The majority of the development of QKD is done with discrete variables (DV), i.e. qubits with the …
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Design of New-generation Quantum Key Distribution Systems for Secure Communication
Quantum information processing relies on the principles of quantum physics to gain unique advantages in various information processing tasks. Among them, the quantum key distribu- tion (QKD) technique guarantees the information-theoretic security of the task of remote secure key distribution. …
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The Security of Self-Differencing Avalanche Photodiodes for Quantum Key Distribution
Quantum key distribution (QKD) allows two users to communicate with information theoretic security by encoding information on single photons. This security is based on the laws of physics and as such can never be broken in theory. However, in practice, components do not always behave according to …
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Practical Continuous Variable Quantum Key Distribution System with ‘Local’ Local Oscillator
Quantum key distribution (QKD) has been proven to promise unconditionally secure data communication between remote legitimate users，based on the fundamental laws of quantum mechanics. QKD has great potential to be commercialized in the market and implemented in securing critical institutions, such …
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DESIGN OF AN OPTICAL GROUND STATION FOR SPACE-BASED QUANTUM KEY DISTRIBUTION
Quantum key distribution (QKD) provides information-theoretic security built on the ‘No Cloning’ Theorem and recent efforts have demonstrated that space-based QKD may be established with acceptable link loss. Meanwhile, on the ground, a network of optical ground station (OGS) is necessary to …
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DEPLOYED QUANTUM KEY DISTRIBUTION WITH A ROOM-TEMPERATURE TELECOM SINGLE PHOTON SOURCE
Quantum key distribution (QKD) allows distant users to communicate with perfect secrecy based on the principles of quantum physics. Practical QKD in deployed fibers serves as an important part of the future quantum networks. Although Weak Coherent Pulses have achieved impressive key rates as QKD …
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Efficient Information Reconciliation for Quantum Key Distribution = Reconciliación eficiente de información para la distribución cuántica de claves
Advances in modern cryptography for secret-key agreement are driving the development of new methods and techniques in key distillation. Most of these developments, focusing on information reconciliation and privacy amplification, are for the direct benefit of quantum key distribution (QKD). In this …
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Practical, High-Speed, Gaussian Modulated Coherent State Continuous Variable Quantum Key Distribution with Real-Time Post Processing
Quantum key distribution is proven to achieve unconditional security based on the laws of quantum physics. Quantum key distribution was originally proposed using discrete variables. Later, continuous-variable quantum key distribution has been introduced. Continuous variable quantum key distribution …
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A Novel Multiple Access Quantum Key Distribution Network for Secure Communication. An Investigation into The Use of Laws of Quantum Physics And Communication Protocols To Enable Multiple Clients To Exchange Quantum Keys In A Lan Environment For Secure Communication
… and government agencies are trying to build quantum computers to solve some complex problems. These problems include prime factorisation of large numbers, a critical factor in the field of cryptography. Quantum computers are much more potent because of their nature. It processes information …
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