Method for checking the integrity of a program or data, and apparatus for implementing this method

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United States of America Patent

PATENT NO 5442645
SERIAL NO

08328963

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Abstract

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The invention relates to a method and apparatus for checking the integrity of a message such as a program and/or data against an original message supposed to correspond to it. By using an algorithm (A) on at least part of the original message, at least one signature (S1, S2, . . . Sm) of this part is calculated and memorized in a memory area (10) of a portable object (1) which also has processing circuits (11) able to implement algorithm (A). In order to check the integrity of a message, at least one signature of a message part is calculated by the processing circuits (11) of the portable object by implementing the algorithm (A) and is compared to an original message signature supposed to correspond, and memorized in memory area (10).

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Patent Owner(s)

  • CP8 TECHNOLOGIES

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Oisel, Andre Elancourt, FR 4 334
Ugon, Michel Maurepas, FR 25 2299

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