Abstract
With the new application systems integrated with existing systems, many problems have arisen, such as system integration difficultly and audit function loss. Hence, Single Sign-on has become an important solution for popular enter- prise business integration at present. According to the research and exploration of SSO system which is based on Yale- CAS authentication protocol, this paper introduced the integration of application systems using user-mapping with making the least amount of modifications. In addition, this paper has provided a complete security audit function for the single sign-on system, so a more comprehensive system security can be provided.
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