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Authorization, written down.

Field notes, best practices and market reading from the team building identity-first authorization for the enterprise.

Oct 20, 2026

XACML, OPA, and PBAC: How to Modernize Legacy Authorization Without Rebuilding Everything

A regional bank gets a request from its regulator during a routine examination. The examiner wants every customer account a specific relationship manager could view during March, across both the loan origination system and the new mobile banking API. The loan system makes its access decisions through a XACML policy decision point the bank deployed in 2014. The mobile API runs on Kubernetes, and the platform team protects it with Open Policy Agent sidecars running Rego policies they wrote two years ago.

Hila Shitrit Nissim

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