An authoritative record is the approved source of truth for a given item of data inside an organization. Other copies may exist in email, spreadsheets, caches, or downstream systems, but the authoritative record is the version that governance rules say should be trusted for decisions, reporting, or automation.
In cyber security, authoritative records matter because security controls depend on accurate ownership, identity, asset, and configuration data. If the trusted record is unclear, defenders can miss unauthorized changes, apply the wrong access rights, or investigate the wrong system. Attackers also benefit from version drift: if multiple copies disagree, they can hide malicious edits, create confusion during incident response, or abuse weak synchronization between systems. Good defenses use strong data ownership, validation, audit trails, and controlled interfaces so that updates flow from the right source and every other copy can be verified against it.