# Audit Log **Entity class:** Security, Compliance, And Authorization Layer concept **Audit Log** is a governance and assurance mechanism that constrains who may use data, for what purpose, under what controls, and with what audit evidence. The operational value of Audit Log lies in preserving time, provenance, confidence, and alternative explanations. ## Counterterrorism predictive-graph role Its controls are part of the computational trust fabric, not peripheral paperwork: permissions, provenance, purpose, and auditability must remain machine-enforceable across systems. The analytic state should distinguish ground truth, observed evidence, inferred state, and predicted state. ## Relationships - **domain router:** [[wiki/Assurance Infrastructure|Assurance Infrastructure]]. - **ontology neighbors:** [[wiki/Certificate Chain|Certificate Chain]] and [[wiki/Audit and Accountability|Audit and Accountability]]. - **synthesis:** [[wiki/Counterterrorism Predictive Graph|Counterterrorism Predictive Graph]] and [[wiki/Predictive Intelligence Loop|Predictive Intelligence Loop]]. ## Sources - [NIST SP 800-53 Rev. 5, Release 5.2.0, August 27, 2025](https://csrc.nist.gov/pubs/sp/800/53/r5/upd1/final) - [ODNI — ICD 503, Intelligence Community Information Technology Systems Security Risk Management, September 15, 2008](https://www.dni.gov/files/documents/ICD/ICD_503.pdf) **As of:** 2026-09-23