Abstract
With the development of Information Technolo gy, distributed integrated system of PDM and CAPP has being focused on by many researchers. To enhance the security access control ability of the integrated PDM and CAPP system, an operational model based on attribute certificate with roles was made. It can prevent unknown entity from accessing to the product data in the integrated system. The function framework of security access control system was analyzed in detail. The function of fine-grained access control system was presented.
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