可证明安全的基于ID的无可信中心签名方案

摘要

An efficient ID-based signature scheme without trusted party is proposed, against the problem of key escrow of ID-based signature system. The new scheme could solve the key escrow problem through binding two partially public keys with a same identity. Under the random oracle model, it has been proved secure against existential forgery on adaptively chosen message and ID attack based on the hardness of the computation diffie-hellman problem(CDHP).%针对现有的基于身份签名系统的密钥托管问题,提出了一种新的基于身份的无可信中心签名方案.新方案通过将两个部分公钥绑定相同的一个身份,从而解决了密钥托管问题.在随机预言模型下,基于CDHP困难问题,新方案被证明能够抵抗适应性选择消息和身份的存在性伪造攻击.