The National Institute of Standards and technology releases recommendations for key derivation using pseudorandom functions
August 23, 2022 |
The National Institute of Standards and Technology (“NIST”) has released recommendations which specific techniques for the derivation of additional keying material from a secret key obtained through either a key establishment scheme or shared through other way.
It is common that a cryptographic key is not sufficient. Usually additional keys are needed, often from the output of a key-derivation function (KDF) that takes a preexisting cryptographic key (and other data) as input. Key-derivation functions are used to derive additional keys from a cryptographic key.
