without using a key

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• Key authentication — is a problem that arises when using public key cryptography. It is the process of assuring that the public key of person A held by person B does in fact belong to person A .In traditional symmetric key cryptography, this problem wasn t an issue… …   Wikipedia

• Key disclosure law — Key disclosure laws, also known as mandatory key disclosure, is legislation that require individuals to surrender cryptographic keys to law enforcement. The purpose is to allow access to material for confiscation or digital forensics purposes and …   Wikipedia

• Key exchange — is any method in cryptography by which cryptographic keys are exchanged between users, allowing use of a cryptographic algorithm. If Alice and Bob wish to exchange encrypted messages, each must be equipped to decrypt received messages and to… …   Wikipedia

• Key size — In cryptography, key size or key length is the size measured in bits[1] of the key used in a cryptographic algorithm (such as a cipher). An algorithm s key length is distinct from its cryptographic security, which is a logarithmic measure of the… …   Wikipedia

• Key (music) — Scale degree names[1] (C major scale). In music theory, the term key is used in many different and sometimes contradictory ways. A common use is to speak of music as being in a specific key, such as in the key of C major or in the key of F sharp …   Wikipedia

• Key management — is a term used to describe two different fields; (1) cryptography, and (2) physical key management (or electronic key management) within building or campus access control.In cryptography, key management includes all of the provisions made in a… …   Wikipedia

• Key (lock) — A cut key A key is an instrument that is used to operate a lock. A typical key consists of two parts: the blade, which slides into the keyway of the lock and distinguishes between different keys, and the bow, which is left protruding so that… …   Wikipedia

• Key Skills Qualification — The Key Skills Qualification [http://www.qca.org.uk/603.html] is a frequently required component of 14 19 education in England, Northern Ireland and Wales. The aim of Key Skills is to encourage learners to develop and demonstrate their skills as… …   Wikipedia

• Key punch — A key punch is a device for entering data into punched cards by precisely punching holes at locations designated by the keys struck by the operator. Early keypunches were manual devices. Later keypunches were mechanized, often resembled a small… …   Wikipedia

• Key (cryptography) — In cryptography, a key is a piece of information (a parameter) that determines the functional output of a cryptographic algorithm or cipher. Without a key, the algorithm would produce no useful result. In encryption, a key specifies the… …   Wikipedia

• Key distribution — In symmetric key cryptography, both parties must possess a secret key which they must exchange prior to using any encryption. Distribution of secret keys has been problematic until recently, because it involved face to face meeting, use of a… …   Wikipedia