id: "AU-10" title: "Non-repudiation" family: "AU" family_name: "Audit and Accountability" sort_id: "au-10" priority: "P2" implementation_level: "system" enhancements: - au-10.1 - au-10.2 - au-10.3 - au-10.4 - au-10.5
Statement
Provide irrefutable evidence that an individual (or process acting on behalf of an individual) has performed {{ insert: param, au-10_odp }}.
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.
Assessment Objective
irrefutable evidence is provided that an individual (or process acting on behalf of an individual) has performed {{ insert: param, au-10_odp }}.
Audit and accountability policy
system security plan
privacy plan
procedures addressing non-repudiation
system design documentation
system configuration settings and associated documentation
system audit records
other relevant documents or records
Organizational personnel with information security and privacy responsibilities
system/network administrators
system developers
Mechanisms implementing non-repudiation capability