摘要
提出了一个有效的代理环签名方案.该方案中,原始签名人首先对授权信息签名,环中的代理签名人生成自己的代理密钥以后,利用修改的Chow提出的基于身份的环签名算法签名.在随机预言机模型下利用环签名分叉引理证明了所提方案的强不可伪造性依赖于CDH问题.代理环签名的计算不需要配对运算,签名验证只需要2个配对运算,与现有方案相比,新方案具有更高的计算效率.
An efficient proxy ring signature scheme was proposed. The original signer firstly signs a warrant and then the proxy signers in the ring generate their proxy private keys and finally, each proxy signer can finally generate a proxy ring signature using the modified identity based ring signature proposed by Chow. Strong unforgeability of the new scheme was proven to rely on CDH problem by using forking lemma for ring signature under the random oracle model. No pairing operation is required for the generation of a proxy ring signature and only two pairing operations are required for the verification. Comparing with the existing schemes, the new scheme is more efficient in computation.
出处
《北京邮电大学学报》
EI
CAS
CSCD
北大核心
2007年第3期23-26,共4页
Journal of Beijing University of Posts and Telecommunications
基金
国家自然科学基金项目(6037204660573043)
关键词
双线性对
代理签名
环签名
匿名性
bilinear pairings
proxy signature
ring signature
ambiguity
