【作者】 宋庆；

【导师】 杨天奇；

【作者基本信息】 暨南大学 ， 计算机软件与理论， 2006， 硕士

【摘要】 证实数字签名是在不可否认数字签名的基础上提出的一种新的具有特殊用途的数字签名方案。本文在分析已有证实数字签名算法缺陷的基础上，将零知识证明引入证实数字签名，提出了一个改进的证实数字签名方案。在此方案的基础上，结合RSA公钥密码体制，建立了一个多用户的信息加密系统。该系统中，发送者只需将包含零知识证明信息的扩展的发送信息进行一次密文签发，通过服务器，就可以传给多个接收者。接收者通过解密及验证算法，可以得出正确的明文同时证实发送者的身份信息。该信息加密系统通过证实数字签名算法来实现系统的不可否认性。最后，初步实现了基于证实数字签名的多方信息加密系统的原型设计。更多还原

【Abstract】 Confirmer digital signature is presented on the basis of undeniable signature. It is a new kind of digital signature with special purpose. In this paper, an improved confirmer digital signature is presented according to the analysis of the traditional confirmer signature algorithm and the introduction of zero-knowledge proof. Then combining this improved algorithm with RSA public key algorithm, we design a multi-user information encryption system. In this system, sender just need sign the encrypted message which includes zero-knowledge information once. Server will deliver this encrypted message to any limited receivers safely. By using decryption algorithm and validation algorithm, receivers can get right message and verify the validity of the sender’s identity. This system has the attribute of non-repudiation of the sender by using the improved confirmer signature. In the end, the system is implemented primarily.更多还原