A backdoor in a computer system (or cryptosystem or algorithm) is a method of bypassing normal authentication, securing remote access to a computer, obtaining access to plaintext, and so on, while attempting to remain undetected. The backdoor may take the form of an installed program (e.g., Back Orifice) or may subvert the system through a rootkit.
Other articles related to "backdoor":
... acceptance speech in 1984, was the first major paper to describe black box backdoorissues, and points out that trust is relative ... It describes a very clever backdoormechanism based on the fact that people only review source (human-written) code, and not compiled machine code ... a modified version of the Unix C compiler that would Put an invisible backdoorin the Unix login command when it noticed that the login program was being compiled, and as a twist Also add this feature undetectably ...