U.S. flag   An unofficial archive of your favorite United States government website
Dot gov

Official websites do not use .rip
We are an unofficial archive, replace .rip by .gov in the URL to access the official website. Access our document index here.

Https

We are building a provable archive!
A lock (Dot gov) or https:// don't prove our archive is authentic, only that you securely accessed it. Note that we are working to fix that :)

Computer Security Resource Center

Computer Security Resource Center

This is an archive
(replace .gov by .rip)
    Glossary
A  |  B  |  C  |  D  |  E  |  F  |  G  |  H  |  I  |  J  |  K  |  L  |  M  |  N  |  O  |  P  |  Q  |  R  |  S  |  T  |  U  |  V  |  W  |  X  |  Y  |  Z

Key expansion

Definition(s):

  Routine used to generate a series of Round Keys from the Cipher Key.
Source(s):
FIPS 197 under Key Expansion

  The second step in the key derivation procedure specified in this Recommendation to derive keying material with the desired length.
Source(s):
NIST SP 800-56C [Superseded]

  The second step in the key-derivation procedure in which a key-derivation key is used to derive secret keying material having the desired length(s). The first step in the procedure is randomness extraction.
Source(s):
NIST SP 800-133 Rev. 2