Electronic Commerce (EC) is based on the Internet. However,due to a global, open, dynamic and shared Internet, it has affected greatly the development and popularization of EC. Security protocol offers confidentiality, integrality, authentication and non-repudiation over an open network. In this paper, security protocol of EC is regarded as the main research object.Security is the cornerstone of electronic commerce,e-commerce transactions to ensure the confidentiality of information, authenticity, integrity, nonrepudiation and access control is an urgent need for developing e-commerce solution. Comparison of the current range of e-commerce security protocol Secure Sockets Layer protocol mainly SSL, Secure Electronic Transaction SET domain security agreement and the tripartite 3-D secure. Paper, these three major agreements in-depth analysis and comparison, raised the issue, analyze the shortcomings of these three security protocols, and put forward corresponding countermeasures.
Key words:E-Commerce Security Protocol, SSL , SET , 3-D secure