基于EPR粒子对的信息签名协议

研究了利用Einstein-Podolsky-Rosen (EPR)对的纠缠特性进行量子数字签名的方案,提出了一个基于测量结果比较的签名协议以及一个基于隐形传态的签名协议. 在基于测量结果比较的签名协议中,通信双方测量各自的EPR并将测量结果与消息M进行比较可以实现M的签名和验证,同时通过量子单向函数来保证协议的安全. 在基于隐形传态的签名协议中,消息发送者将M通过隐形传态传递给接收者来实现对M签名并验证,其安全性由量子隐形传态的物理特性来保证. 这两种协议均可以脱离可信赖的第三方,且通信过程中不需要密钥,具有无条件安全性.

Information signature protocols using Einstein-Podolsky-Rosen pairs

Two quantum digital signature schemes using the entanglement character of Einstein-Podolsky-Rosen(EPR) pairs were researched,and a protocol based on comparing the measurement result and the other protocol based on teleportation were proposed.In the first protocol,the communicators measured their EPR and compared the measurement results with the message M to implement signature and verification,in the meantime using quantum one-way function to guarantee its security.In the second protocol,the sender sent M to the receiver via quantum teleportation to implement signature and verification,whose security was guaranteed by the physical characteristics of quantum teleportation.These two protocols did not need a third party who was worthy of being trusted,neither need any keys in the communication process.Furthermore,they had unconditional security.