$ credential
1. (I) /authentication/ "identifier credential": A data object
that is a portable representation of the association between an
identifier and a unit of authentication information, and that can
be presented for use in verifying an identity claimed by an entity
that attempts to access a system. Example: X.509 public-key
certificate. (See: anonymous credential.)
2. (I) /access control/ "authorization credential": A data object
that is a portable representation of the association between an
identifier and one or more access authorizations, and that can be
presented for use in verifying those authorizations for an entity
that attempts such access. Example: X.509 attribute certificate.
(See: capability token, ticket.)