Authorization Process that a service or a service provider goes through to allow you as an individual to do something, or gain access to something, or have something. The process of identifying an individual, usually based on a username and password. In security systems, authentication is distinct from authorization. Authentication merely ensures that the individual is who he or she claims to be, but says nothing about the access rights of the individual. Back Door A deliberately planned security breach in a program.
Back doors allow special access to a computer or program.
Sometimes back doors can be exploited and allow a cracker access to unauthorized data. They all have a similar pattern - a hook, a threat, and a request. Account passwords are an example. The misuse, alteration, disruption or destruction of data processing resources. The key aspect is that it is intentional and improper.