The security of quantum key distribution (QKD) has been proven for different protocols, in
particular for the BB84 protocol. It has been shown that this scheme is robust against …

Quantum key distribution (QKD) offers a way for establishing information-theoretical secure
communications. An important part of QKD technology is a high-quality random number …

Quantum key distribution (QKD) is a secure key generation method between two distant
parties by wisely exploiting properties of quantum mechanics. In QKD, experimental …

The Bennett-Brassard 1984 (BB84) protocol is the most widely implemented quantum key
distribution (QKD) scheme. However, despite enormous theoretical and experimental efforts …

In this thesis we develop practical tools for quantum key distribution (QKD) security proofs.
We apply the tools to provide security proofs for several protocols, ranging from discrete …

With the help of a simple quantum key distribution (QKD) scheme, we discuss the relation
between BB84-type protocols and two-step-type ones. It is shown that they have the same …

It is generally accepted that quantum key distribution (QKD) could supply legitimate users
with unconditional security during their communication. Quite a lot of satisfactory efforts have …

The security of two-state quantum-key distribution against individual attack is estimated
when the channel has losses and noises. We assume that Alice and Bob use two …

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 …

One crucial step in any quantum key distribution (QKD) scheme is parameter estimation. In a
typical QKD protocol the users have to sacrifice part of their raw data to estimate the …