Chapter 17, Problem 41E

Program Plan Intro

Malicious code:

• A serious damage such as destruction of data or creating a nuisance by sending unwanted messages is called as a malicious code.
• There are many categories of malicious codes:
  • Virus: The self-replicating program which is malicious and embeds itself into another program is called as computer “virus”.
  • Trojan horse: A kind of program that is helpful in some way but creates a different kind of problem when it gets executed.
  • Worm: A standalone program that targets network resources is called as a worm. It sends copies of itself to the network by consuming the bandwidth.
  • Logic bomb: The malicious code that executes when a certain system-oriented event occurs is called as a logic bomb.