Access Control is an IT Security feature which controls how an user access a resource or a system. This is also applicable with physical Access Control, whereby control is performed by Security Officer and/or access devices such badges, biometrics, etc. To greatly simplify a long list of definitions and scenarios, once the authentication establishes, or recognizes your identity, access control comes in force allowing access to the resources whose your identity is associated. The bank cash point provides a good example of authentication via the keypad and your debit card (two factors authentication) and allow access to your money only.
In term of specific computer security, we provide assistance in these main categories of Access Control:
Role Base Access Control (RBAC)
Identity Based Access Control
Rules Access Control (Via Attributes Access Control).