提出了基于两粒子纠缠态的一个三方量子密钥协商协议.方案中的三个参与者是完全对等的,且对建立的共享密钥具有相同的贡献.除此之外,三方中的任何一方或两方都不能事先单独决定共享密钥.安全分析表明本协议既能抵抗外部窃听者的攻击,又能抵抗内部参与者攻击.
A three-party quantum key agreement protocol based on EPR pairs is proposed, in which the three participants have equal status in the protocol and each participant is capable of contributing to the shared secret key in the same degree. In addition, any one or two parties cannot predetermine the value of shared key alone. The security analysis shows that our protocol can resist the outside attack and the dishonest participants attack.