一种基于身份的无可信中心的代理签名方案

ID-based proxy signature scheme without trusted center

在已有的基于身份无可信中心签名的基础上,结合基于身份的代理签名提出了一个基于身份无可信中心的代理签名。提出的签名方案不仅满足代理签名方案的基本安全要求,而且保证了代理签名人只能对所指定的签名接收人产生代表原始签名人的有效代理签名,从而防止了代理签名权利的滥用。与已有的方案相比,该方案中协议与算法简洁、高效,在安全强度不变的条件下,降低了软硬件实现的系统开销,可广泛应用于电子商务等网络业务环境。

Based proxy signature,a new ID-based proxy signature without trusted PKC is proposed.Analysis of the security of the proposed scheme shows that it satisfies the basic security requirements of proxy signature,and the valid proxy signature generated by the proxy signer on behalf of the original signer can only be verified and thus accepted by the receiver nominated by the original signer.In the communication protocols,the processes of signature,authentication,encryption and decryption are simultaneously completed in a single protocol process and the conventional crypto graphical protocols in data transferring are greatly simplifiedwithout in fluencing the security of system.Further detailed analyses also justify the brevity of scheme,security,high efficiency,and considerable reduction in systemoverheads regarding software and hardware application.