Method for authenticating a message

Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique

Reexamination Certificate

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Reexamination Certificate

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07613925

ABSTRACT:
A transmitting device (100) generates a message (102). The message has a message length (104) and comprises message data (106). A key input (108) is identified, and a message authentication key (112) is derived based on the key input and the message length. Based on the message authentication key and the message data, a message authentication code (118) is derived, which is used to authenticate the message.

REFERENCES:
patent: 5651069 (1997-07-01), Rogaway
patent: 6226742 (2001-05-01), Jakubowski et al.
patent: 2002/0165912 (2002-11-01), Wenocur et al.
patent: 0678 836 (1995-10-01), None
patent: 0725 511 (1999-07-01), None
Alfred Menezes, Paul van Oorschot, Scott Vanstone; Handbook of Applied Cryptography; 1997; CRC Press; Chapter 9.
Bellare et al. The Security of the Cipher Block Chaining Message Authentication Code Sep. 12, 2001 pp. 3, 13 and 16.
Bart Preneel and Paul C. Van Oorschot, MDx—MAC and Building Fast MACs from Has Functions, Proceedings Crypto '95, Springer-Verlag LNCS, Aug. 1995, 14 pages, N. F.W.O. postdoctoral researcher, sponsored by the National Fund for Scientific Research (Belgium).
AES Key Wrap Specification, National Institute of Standards and Technology, Nov. 16, 2001, 23 pages.

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