具有前向安全特性的盲签名方案

Blind Signature Scheme with Forward Security

盲签名和前向安全特性在密码学研究中已成为热点.盲签名在实际应用中起着保护消息发送方隐私权的重要作用.前向安全特性能有效地减少因签名密钥泄露而带来的损失,即使签名密钥在j时段被盗,窃密者也仅能伪造j时段后的有效签名,而j时段前的签名仍然有效.基于ElGamal体制提出了一种具有前向安全特性的盲签名方案,将前向安全特性引入到盲签名方案中,并分析了该方案的安全性.

Blind signature and forward security have become the hot points in the research of cryptography. Blind signature plays an important role in protecting the senders＇ privacy. Forward security can effectively reduce the loss caused by exposure of secret keys. To a forward security signature scheme, even if the signature key of priod j is usurped, the usurper can only forge the valid signature after period j and the signature before period j is still secure. In this paper, the authors present a blind signature scheme with forward security based on ElGamal, which applied the characteristics of forward security to the blind signature scheme. Furthermore, the security of the proposed scheme is analyzed.