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基于椭圆曲线的代理多签名方案的安全性分析
Security Analysis of Some Proxy Multi-Signature Schemes Based on Elliptic Curve Cryptosystem
【摘要】 在一个安全的代理签名方案中,只有指定的代理签名人能够代表原始签名人生成代理签名.基于椭圆曲线离散对数问题,纪家慧和李大兴提出了一个代理签名方案和一个代理多签名方案,陈泽雄等人给出了另外两个代理多签名方案.但是,在他们的方案中,原始签名人能够伪造代理签名私钥.为了抵抗原始签名人的伪造攻击,改进了代理签名密钥的生成过程,并对改进的方案进行了安全性分析.
【Abstract】 In a secure proxy signature scheme, only the designated proxy signer could create a valid proxy signature on behalf of the original signer. Based on the elliptic curve discrete logarithm problem, Ji and Li proposed a proxy signature scheme and a proxy multi-signature scheme and Chen et al. proposed two proxy multi-signature schemes. However, in their schemes, the original signer can forge proxy secret key. To eliminate the original signers forgery attacks, a modification of the proxy key generation stage is proposed. Security analysis of the improved scheme is also presented.
【Key words】 elliptic curve discrete logarithm problem; proxy signature; proxy multi-signature; cryptanalysis;
- 【文献出处】 小型微型计算机系统 ,Journal of Chinese Computer Systems , 编辑部邮箱 ,2006年05期
- 【分类号】TN918
- 【被引频次】14
- 【下载频次】147