Stmicroelectronics S.a.

Stmicroelectronics (rousset) Sas

Stephan Courcambeck

William Orlando

Layachi Daineche

Lionel Sinegre

Eric Sagnard

Claude Anguille

Bernard Kasser

A method for managing a product includes: placing an integrated circuit in a bootstrap mode with debugging prohibition in response to each reset or power-up of the integrated circuit and in an absence of a reception, on a test access port of the product, of a first command; and placing the integrated circuit in an analysis mode with debugging authorization in response to reception, on the test access port, of the first command following the reset or the power-up of the integrated circuit. Placing the integrated circuit in the analysis mode is maintained at least as long as a second command has not been received on the test access port. Placing the integrated circuit in the bootstrap mode and placing the integrated circuit in the analysis mode are performed in response to a determination that the integrated circuit has never before been placed in the analysis mode with debugging authorization.

Method for managing a return of a product for analysis and corresponding product

A method and a system of access control between a main processor and peripherals connected by a communication bus, including assigning, to all or part of the programs to be executed by the main processor, at least one token selectively authorizing access to one or several of said peripherals, said token being provided at least initially by an auxiliary processor exploiting a memory distinct from that of the main processor; and checking, for each request of access of one of said programs to one of said peripherals, the presence of said authorization token for the access to the concerned peripheral.

Program access authorization of peripheral devices via a smart card

A method of cyphering, by an integrated processor, of a set of data to be stored in a memory, including performing, in a continuous operation following a data flow, the steps of dividing the data flow into blocks of predetermined size and, for each block: generating a cyphering key using a pseudo-random generator implementing a continuous algorithm of cyphering according to a key specific to the integrated circuit and of an initialization vector changing for each block; combining the data block and the corresponding key in a continuous operation; and storing in the memory each cyphered block and the initialization vector used to cypher it.

Cyphering of the content of a memory external to a processor

Growing community of inventors

Plan de Cuques, France

Stephan Courcambeck