| Patent application number | Description | Published |
|---|
| 20110167279 | METHOD FOR PROTECTING A PROGRAMMABLE CRYPTOGRAPHY CIRCUIT, AND CIRCUIT PROTECTED BY SAID METHOD - A programmable cryptography circuit includes memory-based cells defining the logic function of each cell, integrating a differential network capable of carrying out calculations on pairs of binary variables, including a first network of cells implementing logic functions on the first component of the pairs and a second network of dual cells operating in complementary logic on the second component of the pair. A calculation step includes a precharge phase, in which the variables are put into a known state at the output of the cells, and an evaluation phase in which a calculation is made by the cells. A phase of synchronizing the variables is inserted before the evaluation phase or the precharge phase in each cell capable of receiving several signals conveying input variables, the synchronization being carried out on the most delayed signal. | 07-07-2011 |
| 20110255569 | METHOD FOR SENDING PULSES IN A TRANSMISSION CHANNEL - A method and apparatus are provided for sending pulses from a sender device to a receiver device in a transmission channel. The pulses represent information symbols, with each of these pulses being associated with a time slot in a symbol time. The method includes a training step that is carried out before sending payload information and that includes sending a training sequence made up of two parts. A first part of the training sequence includes at least one pulse of energy that is greater than the energy of a pulse carrying payload information. There are a large number of time slots between the sending of the pulse and the sending of the next pulse. A second part of the training sequence includes a set of pulses known in advance and similar to the pulses used for carrying payload information, the energy of each of these pulses being equivalent to the energy of a pulse carrying payload information. | 10-20-2011 |
| 20110258459 | METHOD FOR PROTECTING THE DECRYPTING OF THE CONFIGURATION FILES FOR PROGRAMMABLE LOGIC CIRCUITS AND CIRCUIT IMPLEMENTING THE METHOD - A method for protecting a programmable logic circuit includes storing data file(s) used for the configuration of the programmable resources of the circuit in a non-volatile memory after having been encrypted. A decryption module internal to the circuit is responsible for decrypting the file(s) by using a secret key stored in the circuit, the decryption module being protected against attacks aiming to obtain the key during the decryption operation by implementing at least one countermeasure technique. | 10-20-2011 |
| 20110261953 | METHOD FOR TESTING CRYPTOGRAPHIC CIRCUITS, SECURED CRYPTOGRAPHIC CIRCUIT CAPABLE OF BEING TESTED, AND METHOD FOR WIRING SUCH CIRCUIT - The present invention relates to a method for testing cryptography circuits. It also relates to a secure cryptography circuit capable of being tested. The cryptography circuit includes registers and logic gates, and a test thereof performs a differential power analysis on the registers of the circuit. A cryptography circuit being secure and including a first half-circuit associated with a second half-circuit operating in complementary logic, the electric power supply of the first half-circuit is separated from the electric power supply of the second half-circuit, the differential power analysis being carried out in parallel on each half-circuit, the two power supplies being combined into one and the same electric power supply after the test. | 10-27-2011 |
| 20120045061 | CRYPTOGRAPHY CIRCUIT PARTICULARLY PROTECTED AGAINST INFORMATION-LEAK OBSERVATION ATTACKS BY THE CIPHERING THEREOF - A cryptography circuit, protected notably against information-leak observation attacks, comprises a functional key k | 02-23-2012 |
