Key Derivation Function

In cryptography, a key derivation function (or KDF) derives one or more secret keys from a secret value such as a master key or other known information such as a password or passphrase using a pseudo-random function. Keyed cryptographic hash functions are popular examples of pseudo-random functions used for key derivation.

Read more about Key Derivation Function:  Uses of KDFs

Other articles related to "key derivation function, keys, key, key derivation functions":

Secure Real-time Transport Protocol - Key Derivation
... A key derivation function is used to derive the different keys used in a crypto context (SRTP and SRTCP encryption keys and salts, SRTP and SRTCP authentication keys) from one single master key in a ... Thus, the key management protocol needs to exchange only one master key, all the necessary session keys are generated by applying the key derivation function ... Periodical application of the key derivation function will result in security benefits ...
Key Derivation Function - Uses of KDFs - Key Stretching
... Key derivation functions are also used in applications to derive keys from secret passwords or passphrases, which typically do not have the desired properties to be used directly as cryptographic keys ... it is generally recommended that the key derivation function be made deliberately slow so as to frustrate brute-force attack or dictionary attack on the password or passphrase ... Such use may be expressed as where is the derived key, is the key derivation function, is the original key or password, is a random number which acts ...

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