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s and Metal Detector s are used to control what is allowed to pass through an Airport Security perimeter]] in the East End Of London ]] Security is the condition of being protected against danger or loss. In the general sense, security is a concept similar to Safety . The nuance between the two is an added emphasis on being protected from dangers that originate from outside. Individuals or actions that encroach upon the condition of protection are responsible for the breach of security. The word "security" in general usage is synonymous with "safety," but as a technical term "security" means that something not only ''is secure'' but that it ''has been secured''. In Telecommunication s, the term security has the following meanings:
''Sources: from Federal Standard 1037C and adapted from the Department Of Defense Dictionary Of Military And Associated Terms '' Security has to be compared and contrasted with other related concepts: , Reliability . The key difference between security and reliability is that security must take into account the actions of active malicious agents attempting to cause destruction. PERCEIVED SECURITY COMPARED TO REAL SECURITY It is very often true that people's perception of security is not directly related to actual security. For example, a fear of flying is much more common than a fear of driving; however, driving is generally a much more dangerous form of transport. The tool may be mistaken for the effect, for example when multiple Computer Security programs interfere with each other, so the user assumes the computer is secure when actual security has vanished. Another side of this is a phenomenon called Security Theatre where ineffective security measures such as screening of airline passengers based on static databases are introduced with little real increase in security or even, according to the critics of one such measure - Computer Assisted Passenger Prescreening System - with an actual ''decrease'' in real security. CATEGORISING SECURITY There is an immense literature on the analysis and categorisation of security. Part of the reason for this is that, in most security systems, the "weakest link in the chain" is the most important. The situation is asymmetric since the ''defender'' must cover all points of attack while the attacker need only identify a single weak point upon which to concentrate. Types of security
Security concepts Certain concepts recur throughout different fields of security.
IT SECURITY STANDARDS
SECURITY EXPERTS SEE ALSO Concepts
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