一种基于EPR纠缠态的量子代理签名方案

代理签名是指能够将原始签名授权给代理人的一种特殊协议，该技术在云计算领域中能够确保信息安全和数据保密。传统的代理签名以求解数学问题的困难性为基础，一旦发明量子计算机，其就会非常容易被破解。本文提出一种新的量子代理签名方案，以量子一次一密与量子隐形传态技术为基础，可以确保系统的安全性。相比传统的基于数论的代理签名，本协议由于使用量子加密技术，能够有效抵抗Shor算法攻击；相比其他的量子签名方案，该方案能够保证接收者的不可否认性；本方案使用了一种特殊量子加密方法，从而确保接收者无法伪造签名。

Quantum Proxy Signature Scheme with EPR Entangled States

The proxy signature provides that the original signer can delegate his signing permission to a proxy signer, and the proxy signer can replace the original signer to sign the message. It can ensure the information secure and data protection in cloud computing. Until now, almost all the traditional proxy signature schemes were based on the mathematic difficulty problems, once the quantum computers are invented someday, these schemes can be broken out easily. This paper proposes a new quantum proxy signature scheme, which is based on the quantum one-time pads and quantum teleportation protocol. Comparing with the traditional proxy signature, the new scheme can resist the Shor’s algorithm by using of quantum encryption; comparing with other quantum signature, the scheme can avoid being disavowed by the receiver; the new scheme uses a special quantum encryption to ensure the receiver cannot forge the signature.