--Originally published at Computer and Information Security
A security countermeasure is an action, process, device or system that can prevent or reduce the effects of threats that attempt to compromise a system. Countermeasures can be software, hardware or through behavior.
Some examples of software countermeasures are:
- Firewalls.
- Anti-virus.
- Pop-up blockers
There are several implementations of hardware countermeasures:
- Alarms.
- Routers that can block IP addresses.
- Physical restrictions to systems.
Finally some behavior countermeasures are:
- Deletion of cookies.
- Backing up data.
- Installing security updates.
Photo by: © Crown Copyright 2013 Photographer: L(Phot) Dave Jenkins
Image 45156167.jpg from http://www.defenceimages.mod.uk