Stmicroelectronics S.a.

Proton World International N.v.

Stmicroelectronics Gmbh

Michel Bardouillet

Luc Wuidart

Alexandre Malherbe

Jean-Pierre Enguent

Pierre Rizzo

William Orlando

Claude Anguille

Pierre Balthazar

Laurent Plaza

Joan Daemen

Yannick Teglia

Pierre-Yvan Liardet

Sylvie Wuidart

Guilhem Bouton

Ahmed Kari

Jean-Michel Ravon

Pierre Guillemin

Maxime Teissier

Nathalie Donat

Vineet Tiwart

Jean-Marie Bourgeois

A method for recording at least one information block in a first volatile memory external to a circuit, a first digital signature being calculated based on information and data internal to the circuit and a second digital signature being calculated based on first signatures of a group of information blocks and on a digital quantity internal to the circuit and assigned to said group. A method for checking the content of an information block recorded by this recording method.

Control of the integrity of a memory external to a microprocessor

An antenna generating an electromagnetic field for an electromagnetic transponder and a terminal provided with such an antenna. The antenna comprises a first inductive element designed to be connected to two terminals employing an energizing voltage, and a parallel resonant circuit coupled with the first inductive element.

Electromagnetic field generation antenna for a transponder

A method and an element of ciphering by an integrated processor of data to be stored in a memory, including applying a ciphering algorithm which is a function of a key specific to the integrated circuit and of an initialization vector, and of memorizing at least the ciphered data, the initialization vector depending at least on the address of storage of the data in the memory.

Stream ciphering of the content of a memory external to a processor

An integrated cell and method for extracting a binary value based on a value difference between two resistors values, including connection circuitry for a binary reading of the sign of the difference between the resistors, and connection circuitry for a modification of the value of one of the resistors to make the sign of the difference invariable.

Extraction of a binary code based on physical parameters of an integrated circuit via programming resistors

A method for protecting at least one first datum to be stored in an integrated circuit, including, upon storage of the first datum, performing a combination with at least one second physical datum coming from at least one network of physical parameters, and only storing the result of this combination, and in read mode, extracting the stored result and using the second physical datum to restore the first datum.

Protected storage of a datum in an integrated circuit

A method and a circuit for generating a secret quantity based on an identifier of an integrated circuit, including combining a first digital word derived from a physical parameter network with a second word stored in a non-volatile memory element.

Regeneration of a secret quantity from an intergrated circuit identifier

A method and a circuit of generation of several secret quantities by an integrated circuit according to the destination of these secret quantities, including taking into account a first digital word forming a single identifier of the integrated circuit chip and coming from a physical parameter network, and of individualizing this identifier according to the application.

Diversification of a single integrated circuit identifier

A method for recording at least one block of variable data in a first volatile memory external to a microprocessor, including calculating and storing a digital signature taking into account at least partially the address and the content of said data block in the memory, and at least a first random digital value internal to the microprocessor.

Integrity control of a memory external to a processor

An integrated cell for extracting a binary value based on a value difference between two resistors values, including connection circuitry for a binary reading of the sign of the difference between the resistors, and connection circuitry for a modification of the value of one of the resistors to make the sign of the difference invariable.

Extraction and stabilization of a binary code based on physical parameters of an integrated circuit

The invention relates to a method and device for the irreversible reduction of the value of an integrated polycrystalline silicon resistor. The inventive method consists in temporarily subjecting the resistor to a stress current which is greater than a current (Im) for which the value of the resistor is maximum.

Irreversible reduction of the value of a polycrystalline silicon resistor

An electromagnetic transponder including: a parallel oscillating circuit adapted to extracting a supply signal from a radiated field; in parallel with the oscillating circuit, several branches each including a programmable resistor and a switch; and a cyclic control element for successively turning on the switches, each resistor forming an element for storing a portion of the code stored in the transponder.

Programmable-code electromagnetic transponder

Extraction of a binary code based on physical parameters of an integrated circuit through programming resistors

The invention concerns a circuit () for storing a binary code (B, B, Bi-, Bi, Bn-, Bn) in an integrated circuit chip, comprising an input terminal () applying a signal (E) triggering reading of the code, output terminals (i-1,i,n-1,n) for delivering said binary code, first electrical paths (P, P, Pi, Pn) individually connecting said input terminal to each output terminal, each path inputting a fixed delay in the manufacture of the integrated circuit, and means (i,n) simultaneously integrating the binary states present in output of the electrical paths.

Storing an unchanging binary code in an integrated circuit

A method and a circuit for generating a secret quantity based on an identifier of an integrated circuit, in which a first digital word is generated from a physical parameter network, and this first word is submitted to at least one retroaction shift register, the output of the shift register forming the secret quantity.

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Rousset, France

Michel Bardouillet