Abstract: Comprehensively applying Web services safety standards and now main Web service safety technology to op- timize Web service structure can realizes Web service communication safety. The optimization service structure realizes identity authentication and authorization function by setting business gateway, and realizes confidentiality, integrity and nonrepudiation of the message by extending SOAP agreement. Compared with the technology which focuses on the scr- vice structure extension and the technology which focuses on the agreement expansion to achieve Web service safe, this optimization scheme strengthens the communication security. Combined with the research results, the future research di- rection of the Web service safety is prospected.

Key words: Web service security, Web service structure, SOAP agreement, SOAP expansion