Logic Bomb<p>A logic bomb is a piece of code that is deliberately inserted into a system to trigger a malicious program. Viruses and worms often contain logic bombs that execute a certain payload at a pre-defined time or when some other condition is met. Some viruses attack their host systems on specific dates, such as Friday the 13th or April Fools’ Day. Trojans that activate on certain dates are often called <em>Time Bombs</em>.</p> <p>See also: <a href="https://en.wikipedia.org/wiki/Logic_bomb">Logic Bomb</a></p>