Countermeasure

What Does Countermeasure Mean?

A countermeasure is an action or method that is applied to prevent, avert or reduce potential threats to computers, servers, networks, operating systems (OS) or information systems (IS). Countermeasure tools include anti-virus software and firewalls.

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Techopedia Explains Countermeasure

In IT systems, multiple countermeasures may be applied for enhanced security. Protective countermeasures may be in the form of hardware or software.

Examples include:

  • Routers: Mask Internet Protocol (IP) addresses
  • Anti-virus and anti-spyware applications: Protect against malicious software (malware), including viruses, Trojans and adware
  • Behavioral techniques: Applied by users to deter threats, such as suspicious email attachments
  • Firewalls: Facilitate authorized network access
  • Intrusion detection systems (IDS): Prevent and/or block unauthorized system access
  • Physical security (especially in enterprises): Prevents hacking and network subterfuge
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Margaret Rouse
Technology Expert

Margaret is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical business audience. Over the past twenty years, her IT definitions have been published by Que in an encyclopedia of technology terms and cited in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine, and Discovery Magazine. She joined Techopedia in 2011. Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages.