Three-Party Quantum Key Agreement Protocol Based on Continuous Variable Single-Mode Squeezed States*

Abstract

Abstract The difficulty of quantum key agreement is to realize its security and fairness at the same time. This paper presents a new three-party quantum key agreement protocol based on continuous variable single-mode squeezed state. The three parties participating in the agreement are peer entities, making same contributions to the final key. Any one or two participants of the agreement cannot determine the shared key separately. The security analysis shows that the proposed protocol can resist both external and internal attacks.