Open Policy Agent (OPA) is an open-source project created as a general-purpose policy engine to serve any policy enforcement requirements. OPA is enhanced by OPAL (Open Policy Administration Layer) - a solution that allows you to easily keep your authorization layer up-to-date in real-time. The combination of OPA and OPAL provides a solid alternative for XACML.
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IntroductionA few basic terms to understand the flow:Traditional XACML ArchitectureOPA + OPAL ArchitectureThe differencesSort: