基于双线性对的代理签名

双线性映射作为一种构建密码体制的新工具,在密码学领域中引起了普遍的关注,并在数字签名中得到应用。在代理签名方案中,代理签名人可以代表原始签名人生成签名;在代理多签名方案中,一个代理签名人可以同时代表多个原始签名人在文件上签名。利用椭圆曲线上的Weil配对的双线性性质构造了一个代理数字签名方案和一个代理多签名方案,并对它们的正确性和安全性做了分析。在代理多签名方案中,代理签名的长度均独立于原始签名人的个数,其验证也与一般的代理签名类似。

A Proxy Signature Based on Bilinear Pairing

The bilinear pairings are useful tools in cryptography.And they have wide applications in digital signature.Proxy signature schemes allow a proxy signer to generate a proxy signature on behalf of an original signer.And proxy multi-signature schemes allow a proxy signer can generate a proxy signature on behalf of two or more original signers.A proxy signature scheme and a proxy multisignature scheme are proposed by using the bilinear property of Weil pairing defined on elliptic curves,and their security and correctness are also analysed.The sizes of the proxy signatures in proxy multi-signature scheme is independent of the number of original signers.The verification is similar to that of ordinary proxy signatures.