一种基于身份的前向安全数字签名方案

AN IDENTITY-BASED FORWARD SECURE DIGITAL SIGNATURE SCHEME

前向安全数字签名主要是针对密钥泄露的问题,即使当前密钥泄露,也能够保证先前签名消息的不可伪造性。利用Chebyshev公钥算法,提出一种基于身份的前向安全数字签名算法,它不仅可以利用签名者身份信息作为公钥对签名进行验证,而且能够确保签名的前向安全性。该方案基于大整数因式分解和Cheyshev离散对数难题,具有很高的安全性,分析表明该方案可以达到良好的性能。

The forward secure digital signature mainly aims at the key leaking problem. Even if the current secret key leaks, it can guarantee the unforgeability of the previous signing messages. Based on Chebyshev public key algorithm, we proposed an identity-based forward secure digital signature scheme. It can not only utilise the identity information of signer as the public key to authenticate this signature, but also makes sure the forward security of the signature. The scheme is based on large integer factorisation and Cheyshev discrete logarithm difficult problem, which owns very high security. Analysis shows that the scheme can achieve good performance.