What’s the Difference Between Authenticity and Non-Repudiation in Cybersecurity?

This blog explains why identity assurance requires more than authentication by distinguishing authenticity (confirming origin) from non-repudiation (ensuring actions cannot be repudiated). It outlines use cases—secure email, supply chain transactions, and cloud document signing—and recommends a layered approach using PKI-backed digital signatures, secure timestamping, strong authentication (MFA/biometrics), centralized identity management, and tamper-evident audit trails to maintain accountability across internal systems and third-party ecosystems.