- A digital certificate that binds unforgeably the public key of an entity to the entity's distinguishing identifier, and which indicates the validity of the corresponding private key. [ISO/IEC 13888-1: 1997]
- Public key and identification data signed by a trusted third party to provide authentication and integrity of the key.
- In cryptography, a public key certificate (or identity certificate) is a certificate which uses a digital signature to bind together a public key with an identity — information such as the name of a person or an organisation, their address, and so forth. The certificate can be used to verify that a public key belongs to an individual.