Overview#

Key Derivation Function (KDF) derives one or more Cryptographic Keys from a secret value such as a master Cryptographic Key, a password, or a passphrase using a pseudorandom number generator.

Key Derivation Functions can be used to stretch keys into longer Cryptographic Key or to obtain Cryptographic Keys of a required format, such as converting a group element that is the result of a Diffie-Hellman key-exchange into a Symmetric Key for use with AES. Keyed-Hash Message Authentication Codes are popular examples of pseudorandom number generator functions used for Key Derivation Function.

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« This page (revision-2) was last changed on 31-Jul-2017 09:33 by jim