A credential is a type of entity that represents a proximity card, a biometrics template, or a PIN required to gain access to a secured area. A credential can only be assigned to one cardholder at a time.
The credential entity represents a proximity card, a biometrics template, or a PIN. Credentials are used by Security Center to identify who is requesting access through a secured access point. Credentials are really claims of identity. A credential distinguishes one cardholder from another. For access control to be operational, every cardholder must possess at least one credential. These are typically (but not exclusively) access control cards.
The required credential depends on the type of reader installed at the door.