M6 block cipher system and method for encoding content and...

Cryptography – Communication system using cryptography – Time segment interchange

Reexamination Certificate

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C380S028000, C380S029000, C380S249000, C380S250000, C380S251000, C380S252000, C380S253000, C380S254000, C380S255000, C380S262000

Reexamination Certificate

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07613296

ABSTRACT:
An M6block cipher system and method for encoding content and authenticating a device may use an M6core. The M6block cipher system may include a rotate constant selector selecting one or more rotate constants from a plurality of input rotate constants for output based on a selection signal input thereto, a rotate constant ordering device ordering the selected rotate constants and a common rotate constant input thereto based on a received ordering signal and an M6core generating one or more of an output signal, a validity signal and a round number based on the ordered rotate constants and a plurality of input signals. The system may include a rotate constant scheduler outputting the ordering signal to the rotate constant ordering device in response to the selection signal and the round number.

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patent: 6850252 (2005-02-01), Hoffberg
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John Kelsey, Bruce Schneier, David Wagner (Mar. 1999). “Mod n Cryptanalysis, with Application Against RC5P and M6”.
German Office Action dated Apr. 23, 2009, for corresponding German Patent Application No. 10 2005 056 815.7-31.

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