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Full Title or Meme

A Credential in the digital realm is a structure which contains, at a minimum, a secret value which can be used in Authentication of a Subject.


  • The original digital Credential was just a shared secret, usually called a Password.
  • More secure Credentials keep private keys which are used to build an Identity Token which can include anti-replay elements, that (with User Consent) is sent to a requester.


  • A Certificate binds a credential to an Identifier of its Subject as well as (potentially) other Attributes.
  • Typically there is also a binding to some sort of real-world credential, usually a piece of paper with a seal.