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Computer Security Resource Center

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Key-Encryption-Key (KEK)

Abbreviation(s) and Synonym(s):

KEK

Definition(s):

  The key for the underlying block cipher of KW, KWP, or TKW. May be called a key-wrapping key in other documents.
Source(s):
NIST SP 800-38F under key-encryption key

  A cryptographic key that is used for the encryption or decryption of other keys to provide confidentiality protection for those keys. Also see Key-wrapping key.
Source(s):
NIST SP 800-57 Part 1 Rev. 5 under Key-encrypting key

  A key that encrypts other key (typically Traffic Encryption Keys or TEKs) for transmission or storage.
Source(s):
CNSSI 4009-2015 [Superseded] from CNSSI 4005

  A cryptographic key that is used for the encryption or decryption of other keys.
Source(s):
NIST SP 800-57 Part 1 Rev. 3 [Superseded] under Key-encrypting key

  A cryptographic key that is used for the encryption or decryption of other keys to provide confidentiality protection. Also see Key-wrapping key.
Source(s):
NIST SP 800-57 Part 1 Rev. 4 [Superseded] under Key-encrypting key