Introduction to Logic Bomb

 

                 A logic bomb is a piece of code intentionally inserted into a software system that will set off a malicious function when specified conditions are met (i.e. a trigger)

                 A logic bomb is a program which has deliberately been written or modified to produce results when certain conditions are met that are unexpected and unauthorized by legitimate users or owners of the software.

                 Logic bombs may reside within stand-alone programs or they may be part of worms (programs that hide their existence and spread copies of themselves within a computer system and through networks) or viruses (programs or code segments which hide within other programs and spread copies of themselves).

                 An example of a logic bomb is any program that mysteriously stops working three months after, say, its programmer's name has disappeared from the corporate salary database.

                 In 1992, a computer programmer was fined $5,000 for leaving a logic bomb at General Dynamics. His intention was to return after his program had erased critical data and get paid lots of money to fix the problem