# Term:Symmetric Key

## Contents

## CNSSI 4009

Symmetric Key - Encryption methodology in which the encryptor and decryptor use the same key, which must be kept secret.

## NIST IR 7298

Symmetric Key - A cryptographic key that is used to perform both the cryptographic operation and its inverse, for example to encrypt and decrypt, or create a message authentication code and to verify the code. SOURCE: SP 800-63

## NIST IR 7298

Symmetric Key - A single cryptographic key that is used with a secret (symmetric) key algorithm. SOURCE: SP 800-21 [2nd Ed]

## NIST SP 800-57P1

Symmetric Key - A single cryptographic key that is used with a secret (symmetric) key algorithm.

## NIST SP 800-57P2

Symmetric Key - A single cryptographic key that is shared by both originator and recipient(see symmetric key algorithm) recipient (see symmetric key algorithm).

## NIST SP 800-63v1.0.2

Symmetric Key - A cryptographic key that is used to perform both the cryptographic operation and its inverse, for example to encrypt and decrypt, or create a message authentication code and to verify the code.