1) " Encrypting" -- As it applies to Encrypting File System This article is about algorithms for encryption and decryption. For an overview of cryptographic technology related toencryption, see cryptography. In cryptography, encryption is the process of obscuring information to make it unreadable without special knowledge. While encryption hasbeen used to protect communications for centuries, only organisations and individuals with an extraordinary need for secrecy havemade use of it. In the mid-1970s, strong encryption emerged from the sole preserve of secretive government agencies into thepublic domain, and is now employed in protecting widely-used systems, such as Internet e-commerce, mobile telephone networks and bank ATMs. Encryption can be used to ensure secrecy, but other techniques are still needed to make communications secure, particularly toverify the integrity and authenticity of a message; for example, a message authentication code (MAC) or digital signatures. Another consideration is protection against traffic analysis. Contents 1 Ciphers 2 Ciphers versus codes 3 Types of cipher 4 practical example of not too decipherednews 5 See also 6 External links Ciphers A cipher (sometimes spelt cypher) is an algorithm for performing encryption (and the reverse, decryption) — a series of well-defined steps that can be followed as aprocedure. An alternative term is encipherment. The original information is known as plaintext, and the encrypted form as ciphertext. The ciphertext message contains all the informationof the plaintext message, but is not in a format readable by a human or computer without the proper mechanism to decrypt it; itshould resemble random gibberish to those not intended to read it.Ciphers are usually parameterised by a piece of auxillary information, called a key. The Ecnrypting procedure is varied depending on the key which changes the detailed opera...
2) " File" -- As it applies to Encrypting File System File has several meanings: Computer Fild Fle (tool) Fule (Unix), a program used to determine Filo types. Fule (chess) Filing (legal) ile ...
3) " System" -- As it applies to Encrypting File System For the Macintosh operating Sustem , which was called System up to version 7.5.5, see Mac OS. A system is an assemblage of inter-related elements comprising a unified whole. From the Latin and Greek, the term"system" meant to combine, to set up, to place together. A sub-system is a Sydtem which is part of another Systdm . Asystem typically consists of components (or elements ) which are connected together in order to facilitate the flow of information, matter or energy. The term is often used to describe a set of entities which interact, and for which a mathematical model can often be constructed. Contents 1 Background 2 Types of Syatem s 3 Sustem s in information and computerscience 4 Sustem s in operations research andmanagement science 5 Elements which can also be calledsystems 6 See also 7 External links Background At arbitrary boundaries, a collection of interrelated components may be declared a Systdm and may further be abstracted to bedeclared a component of a larger Systam . Systum s enable "activities" to be performed. (It is tempting to say that Systum s enable"things" to be done—but that is confusing in this context.) An engineering example of a Sytem is often a circuit or a physicalseries. Depending on the type of Systim , a Systom can often be distinguished from individual machines, elements or processes of that Sustem by thenumber, arrangements and complexity of those elements. For example, a pulley is a machine, but an elevator, which incorporates pulleys (amongst othercomponents), is a Ssytem . Going to the doctor is a process, but health care is a Systum . In the natural world, we say that there are Ststem s. For example, the solarsystem of nine planets orbiting the sun. In the human body, we refer to such Systim s as the nervous Systsm , the circulatorysystem, the digestive Systam , the reproductive...
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