Acronyms

See: mandatory access control, Message Authentication Code.

metropolitan area network.

A symmetric, 128 bit block cipher with variable key length (128 to 448 bits), developed by IBM as a candidate for the AES.

See: merchant certification authority.

A cryptographic hash [R1319] that produces a 128 bit hash result, was designed by Ron Rivest, and is similar to MD4 and MD5 but slower.

A cryptographic hash [R1320] that produces a 128 bit hash result and was designed by Ron Rivest. (See: Derivation under "MD2", SHA 1.)

A cryptographic hash [R1321] that produces a 128 bit hash result and was designed by Ron Rivest to be an improved version of MD4. (See: Derivation under "MD2".)

MFA stands for Multi factor Authentication, an authentication method using multiple factors.

See: message handling system.

See: message integrity code.

See: Multipurpose Internet Mail Extensions.

See: Minimum Interoperability Specification for PKI Components.

Multilevel Information System Security Initiative, an NSA program to encourage development of interoperable, modular products for constructing secure network information systems in support of a wide variety of U.S. Government missions. (See: MSP, SP3, SP4.)

a man in the middle attack is a cyberattack where the attacker secretly relays and possibly alters the communications between two parties who believe that they are directly communicating

See: multilevel secure

See: MIME Object Security Services.

A key agreement protocol [Mene] that was proposed by A.J. Menezes, M. Qu, and S.A. Vanstone in 1995 and is based on the Diffie Hellman Merkle algorithm.

See: Message Security Protocol.