Cryptography – Communication system using cryptography – Time segment interchange
Reexamination Certificate
2007-11-20
2007-11-20
Barron, Jr., Gilberto (Department: 2132)
Cryptography
Communication system using cryptography
Time segment interchange
C380S037000, C380S038000, C380S262000
Reexamination Certificate
active
10476138
ABSTRACT:
A method of authenticating a message (111) received via a transmission channel (108) using a Message Authentication Code (MAC). The message comprises a message body (114) and a tag (116) and the method comprises the steps of generating a second tag (115) according to a MAC function (112) on the basis of the received message body and a secret key (113), calculating a distance (117) between the received tag and generated second tag, and comparing (118) the calculated distance with a predetermined threshold value.
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patent: 6851052 (2005-02-01), Graveman
patent: 7039392 (2006-05-01), McCorkle et al.
patent: 7167984 (2007-01-01), Graveman
patent: WO 01/15382 (2001-03-01), None
Von Bernd Friedrichs, “Authentische und zuverlässige Mobilkommunikation für sicherheitsrelevante Anwendungen Teil I: Sicherheitsanforderungen und grundlegende Verfahren. Authentic and Reliable Mobile Communication for Safety-Related Applications Part I: Security Requirements and Basic Algorithms”, Frequenz, Schiele Und Schon GMBH, Berlin, DE, vol. 49, No. ½, Jan./Feb. 1995, (pp. 17-27).
Blom Rolf
Gehrmann Christian
Barron Jr. Gilberto
Cameron Michael
Perungavoor Venkat
Telefonaktiebolaget LM Ericsson (publ)
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