Computer Security Resource Center

Computer Security Resource Center

Computer Security
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IV

Abbreviation(s) and Synonym(s):

Initialization Vector

Definition(s):

  A binary vector used as the input to initialize the algorithm for the encryption of a plaintext block sequence to increase security by introducing additional cryptographic variance and to synchronize cryptographic equipment. The initialization vector need not be secret. Some of the Triple Data Encryption Algorithm Modes of Operation require 3 initialization vectors.
Source(s):
NIST SP 800-20 under Initialization Vector

  A nonce that is associated with an invocation of authenticated encryption on a particular plaintext and AAD.
Source(s):
NIST SP 800-38D under Initialization Vector

  Initialization Vector
Source(s):
NIST SP 800-20
NIST SP 800-38D

  A binary string that is used as an initial value in computing the first iteration in feedback mode. It may be an empty string.
Source(s):
NIST SP 800-108 under IV

  The initialization vector.
Source(s):
NIST SP 800-38A under IV
NIST SP 800-38D under IV