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Recently research is focused on security policy integration and conflict reconciliation among various healthcare organizations. Problem statement: However, challenging security and privacy risk issues still arisen during sharing sensitive patient data in different large distributed organizations. Though eXtensible Access Control Markup Language (XACML) has a powerful capacity of expression, it does not support all the elements character of RBAC. Thus, it has not been built to manage security in large distributed systems in healthcare domain since each organization may join or leave at runtime. The policy redundancy and conflict resolution are important to resolve redundancy and inconsistencies before security policies can be integrated for healthcare collaboration.
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