基于椭圆曲线的公平交换协议

A Fair Exchange Protocol Based on Elliptic Curve

基于椭圆曲线密码体制,提出了一个数字签名方案,并据此建立了一个适用于电子商务的公平交换协议,该协议通过在交易双方之间建立一个安全承诺作为凭证交换数字签名,以达到摆脱可信第三方参与的目的。此公平交换协议具有一般椭圆曲线密码体制密钥较短、安全性能良好的特点,能够摆脱第三方参与,提高运行效率,并同时保证交换双方的模糊性。分析证明,该协议具有可验证性、不可否认性、不可滥用性以及公平性等特点。

A digital signature scheme was proposed based on the elliptic curve crypto-system, then a suitable protocol for fair exchange in electronic commerce was established accordingly. This protocol can keep out the trusted third party and can guarantee the ambiguity of the exchange as well as the general advantages of short key, high level of security and effective operation brought by elliptic curve crypto-system. This protocol analysis proves its verifiability, non-repudiation, abuse-freeness and fairness.