Two protocols of quantum key agreement (QKA) that solely use Bell state and Bell
measurement are proposed. The first protocol of QKA proposed here is designed for two …

Quantum key agreement protocol is a key establishment technique whereby a classical
shared secret key is derived by two or more specified parties equally and fairly based on …

Two quantum key agreement protocols using Bell states and Bell measurement were
recently proposed by Shukla et al.(Quantum Inf. Process. 13 (11), 2391–2405, 2014) …

A new two-party quantum key agreement (QKA) protocol is proposed based on four-qubit
cluster states. Encoded four-qubit cluster states can be transmitted directly by means of …

A significant aspect of quantum cryptography is quantum key agreement (QKA), which
ensures the security of key agreement protocols by quantum information theory. The fairness …

In this paper, we discuss in some detail how multiparty quantum key agreement protocols
must be carefully designed and present a collusion attack to illustrate this point. Then, a …

Since the first quantum key agreement protocol based on Bell state was presented by Zhou
et al., much attention has focused on it, which is based on entangled states and product …

In this paper, two two-party quantum key agreement protocols are proposed with logical χ χ-
states and logical Bell states. These two protocols can be immune to the collective …

In many circumstances, a shared key is needed to realize secure communication. Based on
quantum mechanics principles, quantum key agreement (QKA) is a good method to …

Based on four-qubit cluster states, we present a two-party quantum key agreement (QKA)
scheme using unitary operations. In this scheme, two participants perform the unitary …