Identification	A process via which an entity or actor reveals their Identity. Usually followed by authentication.
Authentication	A process to confirm or deny that an actor is trusted - is the entity to whom an Identity was given. E.g. A password check. Usually followed by authorisation. Authentication of an actor produces one of four results: true positive, true negative, false negative (which leads to wrongly-denied access) or false positive (which leads to unauthorised access).
Three-factor authentication	Authentication that involves checking three facts about an identified actor. Factors can include something they · remember (e.g. password, mother’s name), · carry (e.g. credit card or key) · are (e.g. biometric data.).
Authorisation	A process giving Access to a trusted actor, based on that actor’s known Access rights. Usually followed by Access.
Access	A process to look inside a system to find data (or processes) of interest. data can include files containing executable processes.