The results show that long-distance quantum cryptography over say 200 km will remain secure even with seriously flawed detectors, and the key generation rate is many orders of magnitude higher than that based on full device independent QKD.Expand

Decoy states have recently been proposed as a useful method for substantially improving the performance of quantum key distribution (QKD). Here, we present a general theory of the decoy state… Expand

By making simple modifications to a commercial quantum key distribution system, it is shown that a secure key generation rate of 165 bit/s, which is 1/4 of the theoretical limit, can be obtained over 15 km of a telecommunication fiber.Expand

This paper proposes another "time-shift" attack that exploits the efficiency mismatch of two single photon detectors in a quantum key distribution (QKD) system and proves that if Alice and Bob are unaware of the attack, the final key they share is insecure.Expand

Self-testing quantum random number generators (QRNGs) are studied, in which verifiable randomness can be generated without trusting the actual implementation, and an intermediate category is self-testing QRNG, which provides a tradeoff between the trustworthiness on the device and the random number generation speed.Expand

A high-speed random number generation scheme based on measuring the quantum phase noise of a single-mode laser operating at a low intensity level near the lasing threshold is presented and the generated random numbers have passed all the DIEHARD tests.Expand

Before QKD can be widely adopted, it faces a number of important challenges such as secret key rate, distance, size, cost and practical security, according to a survey of key challenges.Expand

This result shows that, contrary to popular belief, an eavesdropper, Eve, has a non-negligible probability $(\ensuremath{\sim}4%)$ to break the security of the system.Expand

Quantum key distribution (QKD) can, in principle, provide unconditional security based on the fundamental laws of physics. Unfortunately, a practical QKD system may contain overlooked imperfections… Expand

In this paper, we present a fully fiber-based one-way quantum-key-distribution (QKD) system implementing the Gaussian-modulated coherent-state (GMCS) protocol. The system employs a double… Expand