Master key

{
  "id": "MLC-T-CYB-002617",
  "term": "Master key",
  "field": "Cybersecurity",
  "definition": "1. As used in this Recommendation, a key that is used during the key-expansion step of a key-derivation procedure to derive the secret output keying material. This key-derivation key is obtained from a shared secret during the randomness-extraction step.\n\n2. A key used as an input to a key-derivation method to derive other keys. See [NIST SP 800-108].\n\n3. See Key-derivation key.\n\n4. A key used with a key-derivation function or method to derive additional keys. Sometimes called a master key.\n\n5. A key used as an input to a key-derivation method to derive other keys. See SP 800-108.\n\n6. A key used with a key-derivation method to derive additional keys. Sometimes called a master key.\n\n7. A key used as an input to a key-derivation method to derive other keys; see SP 800-108.\n\n8. A key used with a key-derivation function or method to derive additional keys. Also called a master key.",
  "synonyms": [
    "Key-derivation key"
  ],
  "references": [
    "NIST SP 800-56C Rev. 2",
    "NIST SP 800-133 [Superseded]",
    "NIST SP 800-57 Part 1 Rev. 4 [Superseded]; NIST SP 800-57 Part 1 Rev. 5; NIST SP 800-57 Part 1 Rev. 3 [Superseded]",
    "NIST SP 800-57 Part 1 Rev. 4 [Superseded]",
    "NIST SP 800-133 Rev.1 [Superseded]",
    "NIST SP 800-57 Part 1 Rev. 5",
    "NIST SP 800-133 Rev. 2",
    "NIST SP 800-57 Part 1 Rev. 3 [Superseded]",
    "NIST CSRC Glossary"
  ],
  "url": "https://mlchart.com/terminology/cybersecurity/master-key/"
}