具有消息自恢复的ECC认证加密方案

Authenticated encryption scheme with message recovery based on ECC

给出一种新的基于椭圆曲线密码的具有消息恢复功能的数字签名加密方案。Shao的基于椭圆曲线的具有消息恢复的数字签名改进方案,克服了Tzeng方案的缺乏不可否认性和前向安全性的弱点。但Shao算法中对椭圆曲线点与整数求hash值,实际中无法实现。针对Shao方案的这一缺陷作了改进;并在签名中加入时间戳,增加了抵御重发攻击的能力。

A new digital signature encryption scheme with message recovery based on elliptic curve cryptography is presented. Shao proposes an improved digital signature scheme with message recovery based on ECC.It has overcome the weakness of Tzeng＇s scheme that lacks nonrepudiation and forward security.But Shao＇s algorithm which tries to achieve the hash value of a point on elliptic curve and an integer,cannot be realized.It has improved the weakness of Shao＇s scheme.Furthermore,the new scheme appends time stamp to signature,and it can resist against replay attack.