可公开验证的量子代理多重盲签名协议

Quantum Proxy Blind Multi-signature Protocol with Public Verifiability

针对现有的量子代理签名协议,一个代理签名人只能代理一个原始签名人的情况,提出一个代理签名人可同时代理多个原始签名人的量子代理多重盲签名协议.以GHZ态为基础,利用秘密共享原理实现多个原始签名人对代理签名人的授权,并结合经典编码方法实现对量子比特串的签名和验证.由于签名的产生没有使用验证者的密钥,因此任意验证者可根据量子单向函数和酉操作的特性验证签名是否有效,使得协议的应用场景更加广泛.协议的安全性基于无条件安全的量子密钥分发和一次一密算法.

In the current quantum proxy signature protocols, one proxy signer only can represent one original signer. To overcome this limitation,this paper presented a novel quantum proxy blind multi-signature protocol with public verifiability, in which it allows a proxy signer to represent several original signers. Based on the GHZ states, the proposed protocol employs Secret Sharing to realize the authorization of the proxy signer from multiple original signers, and utilizes the classic encoding methods to implement the signature and verification of quantum bit string. Without using the verifier＇s key in the generation of the signature,everyone can verify whether the signature is effective or not by the features of quantum one-way function and the unitary operation, so there is a better prospect of its applications. The security of the proposed protocol depends on Quantum Key Distribution and One-time Pad, which can ensure the unconditional security.