Viaccess

Patrick Soquet

Emmanuel Barau

Olivier Granet

A method for detecting an error in reading a data, includes in a step a) storing a first copy of the data item in a first area of an electronic memory and storing of a second copy of the data item in a second area. Step b) includes reading values of the first and second copies of the data item and in step c) there is a comparison of the read values of the first and second copies of the data item. In step d) if the read values of the first and second copies are identical, then no error is detected. In step e) if the read values of the first and second copies are different, then the method includes repeating steps b) and c). In step f), if the values read in step e) are identical, then an error in the reading of the data item is detected and, otherwise, no error is detected.

Datum reading error detection method

This method in which an attempt to attack a security processor is detected by the security processor itself comprises:

Method for detecting an attempted attack, recording medium, and security processor for said method

This method for renewing the code of an algorithm comprises:

Method and module for renewing the code of a cryptographic algorithm, method and module for generating a seed, security processor and recording carrier for these methods

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Paris, France

Patrick Soquet