Security Principles / 3 min
What is Non-Repudiation?
Non-repudiation gives confidence that an action or transaction cannot later be credibly denied.
Definition
Non-repudiation is assurance that a user or system cannot reasonably deny performing an action. It often depends on logs, digital signatures, timestamps, and strong identity controls.
Examples
Signed documents, payment confirmations, audit logs, and cryptographic signatures can support non-repudiation.
Portfolio takeaway
This concept connects cybersecurity with business trust, legal evidence, and software accountability.