Computer Security Resource Center

Computer Security Resource Center

Computer Security
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secret key

Abbreviation(s) and Synonym(s):

Symmetric key

Definition(s):

  A cryptographic key that must be protected from unauthorized disclosure to protect data encrypted with the key. The use of the term “secret” in this context does not imply a classification level; rather, the term implies the need to protect the key from disclosure or substitution.
Source(s):
FIPS 201 under Secret Key [Withdrawn]

  A cryptographic key used by one or more (authorized) entities in a symmetric-key cryptographic algorithm; the key is not made public.
Source(s):
NIST SP 800-133 under Secret key

  A cryptographic key used by a secret-key (symmetric) cryptographic algorithm and that is not made public.
Source(s):
NIST SP 800-152 under Secret key

  A cryptographic key, used with a secret key cryptographic algorithm, that is uniquely associated with one or more entities and should not be made public.
Source(s):
NIST SP 800-12 Rev. 1 under Secret Key

  A cryptographic key that is used with a secret-key (symmetric) cryptographic algorithm that is uniquely associated with one or more entities and is not made public. The use of the term “secret” in this context does not imply a classification level, but rather implies the need to protect the key from disclosure.
Source(s):
NIST SP 800-57 Part 1 Rev. 3 under Secret key [Superseded]
NIST SP 800-57 Part 1 Rev. 4 under Secret key

  A single cryptographic key that is used with a secret (symmetric) key algorithm.
Source(s):
NIST SP 800-56B Rev. 1 under Symmetric key
NIST SP 800-57 Part 1 Rev. 3 under Symmetric key [Superseded]
NIST SP 800-57 Part 1 Rev. 4 under Symmetric key

  See Secret key.
Source(s):
NIST SP 800-133 under Symmetric key
NIST SP 800-152 under Symmetric key

  A cryptographic key that is used with a (symmetric) cryptographic algorithm that is uniquely associated with one or more entities and is not made public. The use of the term “secret” in this context does not imply a classification level, but rather implies the need to protect the key from disclosure.
Source(s):
CNSSI 4009-2015 (NIST SP 800-57 Part 1 Rev. 3)

  A cryptographic key that is used with a secret key (also known as a symmetric key) cryptographic algorithm that is uniquely associated with one or more entities and shall not be made public. The use of the term “secret” in this context does not imply a classification level, but rather implies the need to protect the key from disclosure.
Source(s):
NIST SP 800-57 Part 2 under Secret key