We devise a simple modification that essentially doubles the efficiency of the BB84 quantum
key distribution scheme proposed by Bennett and Brassard. We also prove the security of …

We present a complete protocol for BB84 quantum key distribution for a realistic setting
(noise, loss, multi-photon signals of the source) that covers many of todays experimental …

We prove the unconditional security of the standard six-state scheme for quantum key
distribution (QKD). We demonstrate its unconditional security up to a bit error rate of 12.7 …

We prove the security of theoretical quantum key distribution against the most general
attacks which can be performed on the channel, by an eavesdropper who has unlimited …

The existing unconditional security definitions of quantum key distribution (QKD) do not
apply to joint attacks over QKD and the subsequent use of the resulting key. In this paper, we …

Establishing the security of continuous-variable quantum key distribution against general
attacks in a realistic finite-size regime is an outstanding open problem in the field of …

Full text: Originally proposed by classical cryptographers, the ideas behind Quantum Key
Distribution (QKD) have attracted considerable interest among the quantum optics …

Quantum Information Theory is an area of physics which studies both fundamental and
applied issues in quantum mechanics from an information-theoretical viewpoint. The …

The security issues facing quantum key distribution (QKD) are explained, herein focusing on
those issues that are cryptographic and information theoretic in nature and not those based …

Many papers have proven the security of quantum key distribution (QKD) systems in the
asymptotic framework. The degree of the security has not been discussed in the finite coding …