Published Online:
Published in Print: September 10, 2003, as Software Intruders

Software Intruders

Article Tools
  • PrintPrinter-Friendly
  • EmailEmail Article
  • ReprintReprints
  • CommentsComments

Backdoor: A secret computer program that gives its creator a method of gaining access without a password to a computer system or computer network, often allowing the infected system to be used in later attacks.

Trojan Horse: A program that evades security and masquerades as something harmless. Unlike viruses, Trojan horses do not replicate themselves, but they can be just as destructive.

Virus: A malicious program or piece of software code that attaches itself to a computer program, usually with unwitting assistance from the computer user. Viruses can replicate themselves, which potentially can clog the system until it stops working. Some viruses destroy data, transmit themselves across networks, and bypass security systems.

Worm: A type of virus that can replicate itself over a computer network and usually performs malicious actions, such as using up the computer's resources and potentially shutting the system down. Hybrid worms may contain viruses, backdoors, and Trojan horses.

SOURCE: Adapted from and other sources

Vol. 23, Issue 2, Page 14

Related Stories
You must be logged in to leave a comment. Login | Register
Ground Rules for Posting
We encourage lively debate, but please be respectful of others. Profanity and personal attacks are prohibited. By commenting, you are agreeing to abide by our user agreement.
All comments are public.

Back to Top Back to Top

Most Popular Stories