Authentication Code (message authenticator) Definition/Meaning:

A cryptographically derived check that is appended to a plain text message or is part of a cipher text message. The check is made in such a way that tampering with we message will be exposed. See cryptography.

Near by Terms:
	AU
	Audio Response Unit
	Audit Trail (audit log)
	Augmented Addressing (augmenting)
	Augmented Transition Network
	Authentication
	Authentication Code (message authenticator)
	Authorization
	Authorization Matrix
	Autocode
	Autodump
	Autoload
	Autoload Cartridge
	Autoload Success Rate
	Automated Tape Library (ATL)
	Automatic Calling Unit
	Automatic Check
	Automatic Coding
	Automatic Data Conversion
	Automatic Data Processing (ADP)
	Automatic Programming
	Automorphism
	Autoregression
	Autothread
	Auxiliary Memory