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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. For example, a programmer may hide a piece of code that starts deleting files (such as a salary database trigger ), should they ever be terminated from the company.
Rope trick effects visible from one of Operation Tumbler–Snapper's tower-mounted test shots in 1952, taken with a rapatronic camera. The adjacent photograph shows two unusual phenomena: bright spikes projecting from the bottom of the fireball, and the peculiar mottling of the expanding fireball surface.
The first use of a time bomb in software may have been in 1979 with the Scribe markup language and word processing system, developed by Brian Reid.Reid sold Scribe to a software company called Unilogic (later renamed Scribe Systems [2]), and agreed to insert a set of time-dependent functions (called "time bombs") that would deactivate freely copied versions of the program after a 90-day ...
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A time bomb's timing mechanism may be professionally manufactured either separately or as part of the device, or it may be improvised from an ordinary household timer such as a wind-up alarm clock, wrist watch, digital kitchen timer, or notebook computer. The timer can be programmed to count up or count down (usually the latter; as the bomb ...
It formats and prints the contents of the last login log file, /var/log/lastlog (which is a usually a very sparse file), including the login name, port, and last login date and time. It is similar in functionality to the BSD program last , also included in Linux distributions; however, last parses a different binary database file ( /var/log ...
Thirty minutes after the virus is activated, this rectangle scrolls up two lines. [5] As a result of the virus hooking into the low-level timer interrupt, PC-XT systems slow down to one fifth of their normal speeds 30 minutes after the virus has installed itself, though the slowdown is less noticeable on faster machines. The virus contains code ...
Nuclear bomb designed to fit inside a suitcase. 1950s Thermometric bomb: Also called a vacuum bomb, or aerosol bomb, this explosive disperses a cloud of gas or liquid. Time bomb: A bomb that is triggered by the timer. Trinitrotoluene: Commonly known as TNT. 1863 Julius Wilbrand: Germany: Unguided bomb: An air-craft dropped bomb that lacks a ...