Defining the word security

A word "security" in the main usage is synonymous by owning "safety," however as a technical indicator term "security" means that something non lone is locate however that it has been secured. For instance, Within telecommunication, the term security has a as punishment meanings:

A affliction that final result from either a establishment & maintenance of protective measures that assure the state of inviolability from either hostile acts or even influences. With respect to classified matter, a trouble that prevents wildcat souls from either with access to official information that is safeguarded in the interests of national security. Measures taken by the military group, an activity or even even installation to protect itself against everthing acts intentional to, or which might, impair its effectiveness.

Sources: from either Federal Standard 1037C and adapted from a Department of Defense Dictionary of Military and Associated Terms

An additional proposed guide definition: When my expectations come met, i may say that quality has been met. Whilst my expectations come met another time & once more, despite of errors, catastrophes & attacks which in theory may cease my expectations to become met, you might say that security has been met. Security is non falsifiable (Popper). I may prove that there has been the security failure, however i potty't prove that there hasn't. Security system improve a likelihood of expectations to exist as met, & so improve security. By owning respect to classified matter there exists an expectation of the classified interest remain secret for when yearn when i wish. The control access models is the security that aids this expectation to exist as accomplished.

A key condition around defining security is that these are an inherently fuzzy construct. Whenever somebody offers we the fag, should your systems bodyguard prevent him? This occurs as method of making your computers demise other in all probability, however, since smart shoppers obviously smoke a butt smart shoppers would assume it badness to exist as deprived. In case, but then, the coffin nail was poisoned, this would exist as a clear breach of security. Virtually all security besides require compromise. For to become safe from either either poisoned cigaret, we must besides assume you may lose access to loose fag from unknown. For to exist as potentially safer, that you must prevent smoking.

Security has to exist as likened & contrasted by owning more related construct: Safety, continuity, reliability. A key difference between security & dependableness is that security must allow a actions of active malicious offices attempting to induce destruction.

The elementary & clear definition of effectual security can be:

the locate body occurs as rules which does exactly what you need it to clean & nothing that you don't desire it to clean potentially while individual else attempt to produce it behave otherwise.

Perceived security compared to real security

These are super typically admittedly that humans's perception of security is non directly related the actual security. E.g., the fear of flight is tremendously additional commons than the fear of camping; nevertheless, camping is usually the lot further unsafe form of transportation.

An additional side of this occurs as phenomenon known as security theatre where ineffective security like screening of airline rider based on data from electrostatic databases come introduced by owning little very increase within security or, according to a critics of of these such measure - CAPPS - with an actual decrease within real security.

Categorising security

There exists an brobdingnagian literature on the analysis & categorisation of security. A share of a understanding for this is that, within virtually all security systems, these are the "weakest link in the chain" which is the first. A situation is asymmetrical since defender must handle tons points of attack when a assailant must just identify of these frail point & concentrate thereon.

Types of security

physical security information security computing security financial security

Security concepts

Certain conception recur throughout different fields of security.

risk - the chance occurs as conceivable event which may stimulate a loss threat - the threat occurs as method of triggering a chance event countermeasure - the countermeasure occurs as way to prevent the threat from either triggering a chance event defense in depth - never rely on a lone single security alone assurance - assurance is the level of guarantee that the security body may behave equally expected

Security standards

TCSEC (Orange Book) Common Criteria [http://www.iso.ch/iso/en/CatalogueDetailPage.CatalogueDetail?CSNUMBER=33441&ICS1=35 ISO 17799:2000 Code of practice for information security management]