【摘要】 匿名技术在隐私保护中具有广泛应用,而签密可以在一个逻辑步骤内同时完成数字签名和公钥 加密两项功能,其代价显著低于常规“先签名再加密”方法的代价.目前的签密算法中,签密人的具体身份 是公开的.该文基于Diffie-Hellman密钥交换协议和匿名签名的思想,在不可分模型下提出了一个无法追 踪签密人身份的无条件匿名签密算法,并证明了该算法的正确性和安全性.更多还原

【Abstract】 Techniques which can realize anonymity play an important role in the protection of partners’ privacy. Sign-cryption can sign and encrypt message in one logic step and has lower cost than that of "firstly sign and then encrypt". Based on the thoughts of Diffie-Hellman decision problem and anonymous signature, an unconditionally anonymous sign-cryption algorithm is given in this paper.更多还原