# AU-10 Non-repudiation

NIST SP 800-53 control. Family: AU Audit and Accountability. Function: detective. Baselines: high. Mapping licence: CC BY-SA 4.0.

Statement: Provide irrefutable evidence that an individual (or process acting on behalf of an individual) has performed [Assignment: organization-defined actions to be covered by non-repudiation].
Guidance: Types of individual actions covered by non-repudiation include creating information, sending and receiving messages, and approving information. Non-repudiation protects against claims by authors of not having authored certain documents, senders of not having transmitted messages, receivers of not having received messages, and signatories of not having signed documents. Non-repudiation services can be used to determine if information originated from an individual or if an individual took specific actions (e.g., sending an email, signing a contract, approving a procurement request, or receiving specific information). Organizations obtain non-repudiation services by employing various techniques or mechanisms, including digital signatures and digital message receipts.

## Enhancements (4)
- AU-10(01) Association of Identities
- AU-10(02) Validate Binding of Information Producer Identity
- AU-10(03) Chain of Custody
- AU-10(04) Validate Binding of Information Reviewer Identity
Withdrawn by NIST: AU-10(05) (now in SI-07).
Each enhancement's statement: /api/v1/controls/AU-10?fields=enhancements

## Patterns that use it (5)
- Critical (2): SP-022 Board of Directors Room; SP-052 Decentralised Identity & Verifiable Credentials (draft)
- Standard (3): SP-001 Client Module; SP-002 Server Module; SP-016 DMZ Module

## Clauses by framework (37 frameworks)
- iso_27001_2022: 7.5, A.8.15. OSA's own, not in NIST's crosswalk: 7.5, A.8.15
- cis_controls_v8: CIS 8
- iso_42001_2023: A.7.5
- bsi_grundschutz: OPS.1.1.5
- anssi: Hygiene.29, RGS.2.1, SecNumCloud.13.7
- osfi_b13: B-13.3.3
- finma_circular: IV.C(66), IV.C(67)
- gdpr: Art.5(2)
- dora: Art.10(1)
- rbi_csf: Annex1.17
- fisc: FISC.O11, FISC.T11, FISC.T12
- lgpd_bcb: LGPD.Art.42-45
- hkma_tme1: TME1.9.3, TME1.10.3, TME1.11.2
- cra: CRA.I.2f
- cbb_tm: TM-12
- cbuae: CR-3
- nca_ecc: 2-12
- qatar_nia: OS
- uae_ia: T7
- bom_ctrm: 4.2
- bcbs_239: Principle 3, Principle 7
- hipaa_sr: §164.312(c)(2), §164.312(e)(2)(i)
- iosco_cyber: DET-1
- sebi_cscrf: DE.AU, RS.AN
- cmmc_2: AU
- common_criteria: CC Part 2 — FAU
- fda_21_cfr_11: §11.10(e), §11.30, §11.50, §11.70
- lloyds_ms: MS5.1, MS8.12
- pra_ss1_23: P3.2, P4.4, P-IT.2
- solvency_ii: Pillar3-Reporting
- csa_ccm_v4: IAM-12
- csa_aicm: IAM-12
- ccss_v9: 1.01.7, 1.04.5, 1.05.1, 1.05.2, 2.02.2, 2.02.3, 2.04.2
- basel_sco60: SCO60.11, SCO60.55, SCO60.62, SCO60.63, SCO60.66, SCO60.70, SCO60.71, SCO60.73, SCO60.82
- bssc: KMS-08, TIS-05
- sec_custody_digital: SEC-CD-05, SEC-CD-15, SEC-CD-16
- dpdpa: Act.6(10)
OSA's mapping for iso_27001_2022 takes NIST's published crosswalk as its base. A clause not marked as OSA's own is in that crosswalk.

## More
- This control as JSON, with guidance and ATT&CK techniques: /api/v1/controls/AU-10
- Clauses only: /api/v1/controls/AU-10?fields=mappings
- Page for people: /controls/au-10/