# Shared Secret

Shared Secret definition in **Computer Security** terms:

Acronym(s): *None*

Definition(s): A secret value that has been computed using a key agreement algorithm and is used as input to a key derivation function.

**Source(s):** NIST SP 800-107 (Superceded by Rev. 1)

A secret value that has been computed using a key-establishment scheme and is used as input to a (single-step) key derivation function or an extraction-then-expansion procedure that derives keying material in a two-step process.

**Source(s):** NIST SP 800-133 (Superceded by Rev. 1)

A secret value that has been computed using a key agreement algorithm.

**Source(s):** NIST SP 800-135 Rev. 1

A value generated during a public-key-based key establishment scheme defined in NIST SP 800-56A or SP 800-56B.

**Source(s):** NIST SP 800-56C (NIST SP 800-56A, NIST SP 800-56B)

A secret value that has been computed using a key-agreement scheme and is used as input to a key-derivation function/method.

**Source(s):** NIST SP 800-57 Part 1 Rev. 3

A value that is generated during a key-agreement scheme; the shared secret is used to derive keying material for a symmetric-key algorithm.

**Source(s):** NIST SP 800-57 Part 3 Rev. 1

A secret used in authentication that is known to the Claimant and the Verifier.

**Source(s):** NIST SP 800-63-2

A secret value that has been computed using a key-agreement scheme and is used as input to a key derivation method.

**Source(s):** NIST SP 800-56A Rev. 2

A secret value that has been computed during a key-establishment scheme, is known by both participants, and is used as input to a key-derivation method to produce keying material.

**Source(s):** NIST SP 800-56B Rev. 1

Synonym(s): *None*

reference: CSRC Glossary

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