Key expansion

{
  "id": "MLC-T-CYB-002333",
  "term": "Key expansion",
  "field": "Cybersecurity",
  "definition": "1. The second step in the key-derivation procedure specified in this Recommendation in which a key-derivation key is used to derive secret keying material having the desired length.\n\n2. The second step in the key derivation procedure specified in this Recommendation to derive keying material with the desired length.\n\n3. 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.",
  "references": [
    "NIST SP 800-56C Rev. 2",
    "NIST SP 800-56C [Superseded]",
    "NIST SP 800-133 Rev. 2",
    "NIST CSRC Glossary"
  ],
  "url": "https://mlchart.com/terminology/cybersecurity/key-expansion/"
}