Security Definitions

Security
Security is being free from danger. The term can be used with reference to crime, accidents of all kinds, etc. Security is a vast topic including security of countries against terrorist attack, security of computers against hackers, home security against burglars and other intruders, financial security against economic collapse and many other related situations. (wikipedia)

Security
Freedom from risk or danger; safety. Freedom from doubt, anxiety, or fear; confidence. (American Heritage Dictionary)

Security
In the computer industry, refers to techniques for ensuring that data stored in a computer cannot be read or compromised by any individuals without authorization. Most security measures involve data encryption and passwords. Data encryption is the translation of data into a form that is unintelligible without a deciphering mechanism. A password is a secret word or phrase that gives a user access to a particular program or system. (webopedia)

Security

Certain concepts recur throughout different fields of security risk

- a risk is a possible event which could cause a loss threat
- a threat is a method of triggering a risk event countermeasure
- a countermeasure is a way to stop a threat from triggering a risk event defense in depth
- never rely on one single security measure alone assurance
- assurance is the level of guarantee that a security system will behave as expected (answers)