Private Key Glossary Definition

Private Key is the confidential half of the asymmetric key pair used in public-key cryptography. Unlike the "secret key" used in symmetric-key cryptography - a single key known by both the sender and the receiver - a private key is known only by the recipient. See public-key cryptography and secret-key cryptography.

In security and compliance work, this term helps teams describe controls, risks, identity practices, standards, audits, or protective technologies. It is relevant when managing access, reducing exposure, documenting safeguards, or demonstrating accountability.