关键词: 电子支付 SET协议 原子性 不可否认性

Abstract:

This paper is based on the groundwork of the mainstream electronic pay protocol named Secure Electronic Transaction （SET）, and then gives an advance d electronic pay protocol named A-SET. A-SET rectifies the transaction flow of SET, inherits the securities of SET, and guarantees the atomicity and non -repudiation of transaction to the fullest extent .As a result, it guarantees the impartiality of both sides.

Key words: electronic pay,SET protocol,atomicity,non-repudiation