基于RSA的可截取签名改进方案

摘要

在多方参与的签名环境中，可截取签名体制（CES）解决了信息的多次签名和多次传递等问题。对现有CES方案进行了分析，发现现有方案截取后的文档存在版式凌乱的缺陷。针对该缺陷，结合批签名思想，提出了一种基于RSA的可截取签名改进方案，并分析了截取者的各种行为对签名验证的影响。研究表明，新方案在保持原方案安全性能不变的基础上，优化了截取文档的结构，提高了签名效率。%Content Extraction Signatures(CES)improve the efficiency of multiparty interaction and resolve the problem of multiple signature and communication. Documents’format becomes messy after messages extraction in the traditional CES scheme. To solve this problem, based on RSA, combining the batch signature idea, this paper promotes a new CES scheme and analyses the effects of the extractor’s behaviors to the verification of signature. Compared with the traditional CES, the new scheme optimizes the structure of the extracted document and improves the signature efficiency without reducing the security performance.