Idemia Identity & Security France

Morpho

Ahmadou Sere

Cyrille Pepin

Houssem Maghrebi

Maël Berthier

Frédéric Boulet

David Daille-Lefevre

Raphaël Geslain

Deny Carhuel

Karim Madjid Ammouche

Michel Benchetrit

Challenge-response authentication process of a secure element (SE) in a micro controller unit (MCU) devoid of a random number generator. The process includes the following steps conducted by the micro controller unit (MCU): receipt of at least one random datum (T, IDX) generated randomly by the secure element (SE), generation of a challenge datum (Z) specific to the micro controller unit (MCU) from the received random datum (T, IDX), sending of the generated challenge datum (Z) to the secure element (SE), receipt of a response datum (R) generated by the secure element (SE) as a function of the challenge datum (Z), and determination of an authentication result as a function of the received response datum.

Process for challenge response authentication of a secure element (SE) in a micro controller unit

The present invention particularly concerns a method for executing a program (P) intended to be interpreted by a virtual machine (M), the method comprising steps of determination () of a reference code instruction to be interpreted when executing the program, interpretation () by the virtual machine of the reference code instruction using machine code. This method also comprises read-out () of interpretation rights data (DR) indicating a portion (P) of the program containing code instructions interpretable by the virtual machine and, on the basis of read-out data, checking the presence () of the reference code instruction in the portion (P) of the program (P), the interpretation of the reference code instruction being implemented by the virtual machine (M) only if the reference code instruction is contained in the portion (P) of the program (P).

Method for executing a program intended to be interpreted by a virtual machine protected against fault injection attacks

The present invention relates to a method for executing a program (P) in an electronic device such as a smart card, including:

Method for protecting an electronic device against fault injection attacks during execution of a program

A method for access to all cells in a memory area for purposes of writing or reading data blocks in the cells may include, for each access time (Ti with i=0 to N) to the cells in the memory area to be accessed, a process of determining the address (ADRj, with j=0 to N) of the cell of the memory area to be accessed at the access time (Ti), an address (ADRj) determined for an access time Ti not being once again determined for another access time (Tk, k&#x2260;j). The process of determining each address (ADRj) may be a pseudorandom process. The method may be used, for example, in any type of card, chip card, SIM card, etc., which includes a processing unit, such as a microcontroller, for manipulating cryptographic data serving to identify and/or authenticate a user of such a card.

Method for access to all the cells of a memory area for purposes of writing or reading data blocks in said cells

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Issy les Moulineaux, France

Ahmadou Sere