Facing the emerging circumstance that the Internet and business globalization have replaced the separation that was typical of the traditional business paradigm, there is a growing concern for security and privacy of data and services. With the emergence of varies Grid projects, how to implement the interoperations among different Grid environments has become a new problem and the secure one should be solved in the first place. In this paper, we introduce a Uniform Secure Interoperation (USI) framework and implement the secure interoperation between Grid Service and Computing System based on it. By using this framework, we can execute the security control when services call happening.
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