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Overview

Integrity assurances are mechanisms that increase trust in a signal or plugin. They are not signals themselves but modifiers of credibility.

Examples under study:

  • Android Play Integrity API — attests to app and device state.
  • Apple App Attest — verifies iOS app legitimacy.
  • Trusted Execution Environments (TEE) — enclaves like TrustZone, SGX, Secure Enclave.
  • Hardware-backed keys — signing with embedded secure elements.
  • Secure boot chains — device starts in a verified state.
  • C2PA content credentials — media provenance.
  • Timestamp notaries — external time anchors.

Future pages will expand these into detailed references.