Credential
A credential is an achievement, aspect of a person's background, authority, competence, personal quality, and/or qualification, typically when used to indicate that this person is suitable for something. A credential could also be a document that a third party issues to a person in order to certify this person's achievement, competence, qualification, etc.
According to the CyBOK (version 1),
- Credential. An input presented for authentication.