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One of the primary challenges to apply the XACML access control policy language in applications is the performance problem of policy evaluation engines, particularly when they experience a great number of policies. Some existing works attempted to solve this problem, but only for some particular use-cases: either supporting simple policies with equality comparisons or predefined attribute values....
XACML policy evaluation efficiency is an important factor influencing the overall system performance, especially when the number of policies grows. Some existing approaches on high performance XACML policy evaluation can support simple policies with equality comparisons and handle requests with well defined conditions. Such mechanisms do not provide the semantic correctness of combining algorithms...
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