Abstract: A countermeasure method for a microcontroller that executes sequences of instructions. The instructions are executed according to a pipeline method. At least one waiting time is randomly introduced between two consecutive instructions and/or within at least one instruction. The method is implemented by the electronics of the microcontroller rather than by software addition.

Abstract: The invention is a method of managing application (AP) execution in an electronic token (ET) comprising at least a first and a second microprocessors (MP1, MP2). One of the microprocessor is the master microprocessor when it has responsibility for application (AP) execution. Said method comprises the step of: selecting (E1) the first microprocessor as master microprocessor, then the step of starting (E2) application (AP) execution by the first microprocessor, then the step of transferring (E4, E12) the responsibility for application (AP) execution to the second microprocessor during the application (AP) execution.

Abstract: The invention relates to a method for generating masks in a communicating object, the masks being intended to mask data to be stored in the communicating object. At least one master mask is stored in the communicating object. According to the invention, the method involves applying at least one diversifier to the master mask so as to generate a diversified mask; masking the datum to be stored in the communicating object by a reversible function using the diversified mask, the mask generating a masked datum; and storing the masked datum in the communicating object with the diversifier used to generate the diversified mask for obtaining the masked datum. The invention also relates to a communicating object including components for implementing such a method.

Abstract: The invention relates to a portable authentication token comprising connection means for connecting to a computer, browser communication means for communicating with a browser running on the computer, and user authentication means for authenticating a user of the token to a server. The user authentication means are triggered via the browser communication means when the user connects to the server from the browser of the computer. The user authentication means are set to authenticate the user by communicating with the server through the browser. The token comprises out-of-band token communication means set to validate user authentication by establishing a communication channel between the token and the server, the communication channel bypassing the browser. The invention also relates to an authentication method and to a system comprising a token, a computer and a server to which the user authenticates with the token.

Abstract: A portable object (1) of the smart card type comprises a main circuit (3, 8, 9, 10) for internal processing and storage of data. The main circuit comprises several integrated circuits (3, 10). The portable object comprises a supply voltage circuit (7) for applying a first supply voltage (3 to 5V) to one of the integrated circuits (3) of the main circuit and for applying a second, different supply voltage (1.2 to 1.8 V) to another integrated circuit (10) of the main circuit.

Abstract: The invention relates to a device and methods for the customised delivery of targeted advertisements from a local server. In particular, the invention relates to the advertising server embedded in an electronic device and to the delivery and updating methods necessary for the operation thereof. According to the invention, the impact of the delivered advertising is optimised since the advertising content presented to the public matches each individual's requirements and centres of interest. Age, sex and geographical location are examples of criteria employed according to the invention.

Abstract: The invention relates to a method for accessing a portable device, the portable device being connected to a host device. According to the invention, the host device, as a client, opens a communication channel to the portable device, as a server, according to a first network communication protocol, and the portable device, as a client, uses the communication channel to transport data to the host device, as a server, according to a second network communication protocol, without the implementation of any complex infrastructure. The invention relates also to a corresponding system for accessing a portable device, a corresponding portable device accessible from outside and a corresponding host device for accessing a portable device.

Abstract: The invention relates to a method and a device for preventing the establishment of a radiofrequency communication between a contactless portable object and another contactless object. If the bearer of the contactless portable object does not modify the state of at least one on-board sensor of the contactless portable object in a specified manner and in specified proportions, the communication is prevented. One purpose of the invention is to prevent the use of the contactless portable object without the bearer's authorization.

Abstract: The invention relates to a method for producing a device comprising a radio frequency transponder antenna, said method comprising a step of producing the antenna with two terminal sections (15, 17) on a support by means of a wiring technique. The method is characterised in that it comprises a step of producing an end point (9) on an antenna wire at the end of at least one of said terminal sections (5, 15, 17). The invention further relates to the device thus produced.

Abstract: The invention concerns an automatic method to secure an electronic calculation assembly against attacks by error introduction or by radiation. The following are used: 1) Static information generated by the automatic process; 2) A dynamic part of the memory of the electronic system allocated by the automatic process; 3) Beacons and check points to mark out the code, introduced by the automatic process; 4) Beacon functions storing information in the dynamic memory; 5) History verification functions using the static information and the dynamic memory to check that no errors have been introduced.

Abstract: A non-volatile memory of a first type, having characteristics of high capacity and coarse granularity, is associated with a non-volatile memory of a second type, having characteristics of low capacity and fine granularity. These memories are managed such that a non-volatile memory resulting from this association has the characteristics of high capacity of the first type of non-volatile memory and fine granularity of the second type of non-volatile memory.

Abstract: The invention is a method of managing flash memory-allocation in an electronic token. Said token has a memory comprising a list area and a managed area. Said managed area comprises allocated spaces and at least one free memory chunk. Said list area comprises at least one valid entry referencing a free memory chunk. Said valid entry comprises a state field. Said method comprises the step of selecting a free memory chunk further to an allocation request where said free memory chunk is referenced by an old entry, and the step of identifying a new allocated space in the selected free memory chunk. The state field of said valid entry is preset with a virgin state. Said method comprises the step of invalidating the old entry referencing the selected free memory chunk.

Abstract: A communication device comprises an RF interface (20) and a CPU (10). The RF interface (20) has a physical channel PhCh to exchange radio messages on a wireless network. The physical channel PhCh is coupled with at least two logical channels LCi. The CPU (10) is connected to the RF interface (20) to provide at least two services Si on the wireless network. Each service Si is associated with a logical channel LCi of the RF interface (20). The CPU (10) associates a transmission parameter Pi with each service Si and sends the said transmission parameter Pi to the logical channel LCi associated with the service Si. The RF interface (20) configures the physical channel PhCh on the basis of the transmission parameter Pi depending on the logical channel LCi under transmission.

Abstract: The invention relates to a portable mass storage device (1) comprising a security application. The security application is executable by a terminal (2) when the terminal (2) is connected with said device (1). The security application is arranged, when executed by the terminal (2), to secure at least a subset of the processes running on the terminal (2) by hooking said processes.

Abstract: The invention relates to a personal token for a mobile telecommunication network, hosting application software. The personal token is operable to receive an over-the-air SMS message encapsulating commands directed to the application, open the SMS and extract the commands from the SMS. The steps of opening the SMS and extracting the commands from the SMS are performed by a software entity in the personal token which is distinct from the application, so that the software entity initiates transmission of the extracted commands to the application.

Abstract: The invention relates to a cryptographic method that incorporates a modular exponentiation secured against hidden channel attacks, without requiring knowledge of the public exponent. The method includes a modular exponentiation and the following steps: drawing of a random value s; initialization of variables with the aid of s; application of an algorithm enabling a loop invariant to be retained by virtue of the properties of the Montgomery multiplier Mgt; unmasking of the result of the algorithm to obtain the signature of the message.

Abstract: The invention relates to a method for processing at least two application commands from at least two physical communication channels respectively using a portable electronic device. The method includes receiving each application command from one of the physical communication channels, determining a priority level associated with each application command, comparing priority levels and identifying the application command with the highest priority among the application commands and processing of the application command with highest priority. The invention also relates to the portable electronic device and an electronic system including a host device cooperating with such a portable electronic device.

Abstract: The invention concerns a process for securing an electronic device incorporating a hardware component capable of autonomous implementation of calculation process f using one key K, the process involves calculating at least two new keys K?i such that at least one of said new keys is identical to key K, and one of said new keys is different from key K, and executing said calculation process f successively with each of said calculated keys K?i, using said hardware component.

Abstract: A mobile station that includes a smart card associated with a mobile host equipment communicates by means of a protocol that is organized in several layers. These layers include at least a data transport layer of the datagram type that is adapted to transmit integral data packets of a maximum size. The transmission method carries out the step of determining the value of the maximum size of data packets that are capable of being integrally transmitted by the transport layer of the mobile host equipment, and storing that value in the card.

Abstract: The invention relates to a cryptographic method secured against a covert channel attack. According to the invention, in order to carry out a selected block of instructions as a function of an input variable amongst N predefined instruction blocks, a common block is carried out on the predefined N instruction blocks, a predefined number of times, the predefined number being associated with the selected instruction block.