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Quantum key distribution with trusted quantum relay [PDF]
arXiv, 2005 A trusted quantum relay is introduced to enable quantum key distribution links to form the basic legs in a quantum key distribution network. The idea is based on the well-known intercept/resend eavesdropping. The same scheme can be used to make quantum key distribution between several parties. No entanglement is required.
arxiv
Unidimensional continuous-variable quantum key distribution
, 2015 We propose the continuous-variable quantum key distribution protocol based on the Gaussian modulation of a single quadrature of the coherent states of light, which is aimed to provide simplified implementation compared to the symmetrically modulated ...
Grosshans, Frédéric +1 more
core +3 more sources
Fake state attack on practically decoy state quantum key distribution [PDF]
arXiv, 2012 In this paper, security of practically decoy state quantum key distribution under fake state attack is considered. If quantum key distribution is insecure under this type of attack, decoy sources can not also provide it with enough security. Strictly analysis shows that Eve should eavesdrop with the aid of photon-number-resolving instruments.
arxiv
Double C-NOT attack on a single-state semi-quantum key distribution protocol and its improvement [PDF]
arXiv, 2020 Recently, Zhang et al. proposed a single-state semi-quantum key distribution protocol (Int. J. Quantum Inf, 18, 4, 2020) to help a quantum participant to share a secret key with a classical participant. However, this study shows that an eavesdropper can use a double C-NOT attack to obtain parts of the final shared key without being detected by the ...
arxiv
Can Quantum Key Distribution Be Secure [PDF]
, 2014 The importance of quantum key distribution as a cryptographic method depends upon its purported strong security guarantee. The following gives reasons on why such strong security guarantee has not been validly established and why good QKD security is ...
Yuen, Horace P.
core
Quantum Authentication and Quantum Key Distribution Protocol [PDF]
arXiv, 2005 We propose a quantum key distribution protocol with quantum based user authentication. Our protocol is the first one in which users can authenticate each other without previously shared secret and then securely distribute a key where the key may not be exposed to even a trusted third party.
arxiv
On the lightweight authenticated semi-quantum key distribution protocol without Trojan horse attack [PDF]
arXiv, 2020 Recently, Tsai et al. (Laser Phys. Lett. 17, 075202, 2020) proposed a lightweight authenticated semi-quantum key distribution protocol for a quantum participant to share a secret key with a classical participant. However, this study points out that an attacker can use a modification attack to make both participants share a wrong key without being ...
arxiv
Unconditionally Secure Multipartite Quantum Key Distribution [PDF]
arXiv, 2003 We consider the problem of secure key distribution among $n$ trustful agents: the goal is to distribute an identical random bit-string among the $n$ agents over a noisy channel such that eavesdroppers learn little about it. We study the general situation where the only resources required are secure bipartite key distribution and authenticated classical
arxiv
General model of quantum key distribution [PDF]
Doklady Mathematics 72 (2005) 795, 2005 A general mathematical framework for quantum key distribution based on the concepts of quantum channel and Turing machine is suggested. The security for its special case is proved. The assumption is that the adversary can perform only individual (in essence, classical) attacks.
arxiv
Unconditionally secure key distribution without quantum channel [PDF]
arXivKey distribution plays a fundamental role in cryptography. Currently, the quantum scheme stands as the only known method for achieving unconditionally secure key distribution. This method has been demonstrated over distances of 508 and 1002 kilometers in the measurement-device-independent and twin-field configurations, respectively.
arxiv