Abstract: The security and trustworthiness issues of Web services are the important factors that influence its development.Most of the existing solutions are from the point of view of security,and lack of considering that services need to still work as expected when facing attacks or threats.In this paper,the notion of security was expanded from the requirement of Web services.The goal and the content of trustworthy were proposed to meet the requirement of Web services.A trustworthy architecture for Web services was proposed.The architecture is based on security interaction,federated identity,and distributed policies and supported by operating maintenance and shared mechanisms.

Key words: Web services,Trustworthy,Architecture,Trustworthy requirement,Mechanism