Trap Doors and Back Doors - technical definition

Undocumented software features that allow a user to gain computer access to or greater privileges through its use. These features may be a software bug or something added by a programmer during software development that was not removed when the software went into production. A trap door, often considered to be a synonym for “back door,” is frequently used by crackers to facilitate exploits.

See Also: Cracker; Exploits.