# Palantir Security Markings **Entity class:** Mandatory access-control mechanism **Architecture:** [[wiki/Signals, Silos, and Sovereign Software|Signals, Silos, and Sovereign Software]] ## Definition **Palantir Security Markings** are mandatory access controls that restrict visibility and action to users who satisfy every marking attached to a resource. Markings can propagate through data transformations so derived products remain protected. ## Modern Defense and Cybersecurity Role Markings make coalition, classified, personally identifiable, and compartmented data usable inside a shared platform without flattening every participant into the same access level. The mechanism supports fusion while preserving mission eligibility rules. ## Chronological Proximity Markings developed as part of Foundry's security model and now govern data used by Foundry, AIP, applications, and agents. ## Relational Proximity [[wiki/Palantir Object-Level Security|Object-level security]] restricts individual rows, objects, and properties; markings provide mandatory controls that follow protected data through pipelines. ## Collection Routes [[collections/The Civilian Intelligence Marketplace|The Civilian Intelligence Marketplace]] · [[collections/Terrorism, Counterterrorism, and the Intelligence Environment|Terrorism, Counterterrorism, and the Intelligence Environment]] ## Sources / Provenance - [Primary documentation](https://www.palantir.com/docs/foundry/security/markings/)