关键词: 代理签名, 椭圆曲线加密, 配对双线性, 伪造攻击

Abstract: 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.

Key words: proxy signature, Elliptic Curve Cryptography（ECC）, bilinear pairings, forgery attack