摘要:
The present invention relates to a contactless communication method between an NFC card with a contact and contactless dual interface, installed in a communication terminal, and an external NFC device, the terminal including an NFC module coupled to the contact interface of the card and including a contactless communication interface, the method including the steps of: selecting one or the other of the contact and contactless interfaces of the card, transmitting signals between the card and the NFC device through the selected interface, and if the contact interface of the card is selected, through the contactless interface of the NFC module, and detecting by the card the presence of the NFC module connected to its contact interface, the selection of one or the other of the contact and contactless interfaces of the card being performed by the card depending on the result of the detection of the NFC module presence.
摘要:
The present invention relates to a method for performing an iterative calculation of exponentiation of a large datum, the method being implemented in an electronic device (DV1) and comprising calculations of squaring and multiplying large variables performed in parallel, by squaring (SB1) and multiplication (SM1) blocks, the method comprising steps of: while a temporary storage buffer memory is not full of unused squares, triggering a calculation by the squaring block for a bit of the exponent, when the squaring block is inactive, storing each square provided by the squaring block in the buffer memory, if the bit of the corresponding exponent is on 1, and while the buffer memory contains an unused square, triggering a calculation by the multiplication block concerning the unused square, when the multiplication block is inactive.
摘要:
A receiving device with intracorporeal current having a device for collecting, by capacitive coupling, an AC signal depending on a current that has passed through all or part of the body of a subject, a device for extracting data from the AC signal collected, and a device for extracting from the AC signal a biological signal generated by the body of the subject and modulating the amplitude of the AC signal.
摘要:
The invention relates to a method for manufacturing a contactless microcircuit antenna coil, including steps of: depositing a first electrically conducting layer on a first face of a wafer, and forming in the first layer an antenna coil in a spiral having several turns, including an internal turn coupled to an internal contact pad and an external turn coupled to an external contact pad, the external turn following the entire contour of antenna coil except for a zone through which a conducting path coupling the external contact pad to the external turn can pass, the external and internal contact pads of the antenna coil being formed in a central zone of the external turn, the antenna coil having a bypass zone in which each turn bypasses the external contact pad.
摘要:
The present invention relates to a near field communication device configured to establish a near field communication channel with an external device, and provide a first host processor with application data sent by the external device. The device is configured to provide a second host processor with notifications relating to the nature or content of application data provided to the first host processor, and configure the notifications according to a characteristic parameter of an application in the framework of which the external device sends data to the first host processor.
摘要:
The present invention relates to a transaction method between a secure processor and a transaction server, via a non-secure processor or a non-secure link, connected to a routing controller, the method including steps of: the controller transmitting to the secure processor, a command message sent by the non-secure processor or by the non-secure link, the controller receiving a response message sent by the secure processor, and the controller transmitting the response message to the non-secure processor or via the non-secure link, the controller analyzing the content of the response message so as to detect data of a first type therein, and removing detected data of the first type from the response message before transmitting it to the non-secure processor or via the non-secure link.
摘要:
The present invention relates to a method for executing a command by a secure element from a non-secure device, the method including steps of: installing in the non-secure device a customized module for managing communications with the secure element, transmitting to the secure element first authentication data for authenticating the customized module, the customized module generating and transmitting to the secure element second authentication data for authenticating the customized module, if the secure element determines that the first and second authentication data are consistent with each other, establishing a secure communication link between the customized module and the secure element, by using the first or second authentication data, the non-secure device transmitting a command to the secure element, for an application installed in the secure element, and the secure element executing the command only if the command is sent via the secure communication link.
摘要:
The invention relates to a method for manufacturing a contactless microcircuit antenna coil, including steps of: depositing a first electrically conducting layer on a first face of a wafer, and forming in the first layer an antenna coil in a spiral having several turns, including an internal turn coupled to an internal contact pad and an external turn coupled to an external contact pad, the external turn following the entire contour of antenna coil except for a zone through which a conducting path coupling the external contact pad to the external turn can pass, the external and internal contact pads of the antenna coil being formed in a central zone of the external turn, the antenna coil having a bypass zone in which each turn bypasses the external contact pad.
摘要:
The invention relates to a method for generating a prime number, implemented in an electronic device, the method including steps of calculating a candidate prime number having a number of bits, using the formula: Pr=2P·R+1, where P is a prime number and R is an integer, applying the Pocklington primality test to the candidate prime number, rejecting the candidate prime number if it fails the Pocklington test, generating the integer from an invertible number belonging to a set of invertible elements modulo the product of numbers belonging to a group of small prime numbers greater than 2, so that the candidate prime number is not divisible by any number of the group, the prime number P having a number of bits equal, to within one bit, to half or a third of the number of bits of the candidate prime number.
摘要:
A method for playing DRM-protected contents, the protected contents being downloaded by a user device from a media server in the form of protected segments, comprises executing a DRM proxy inside the user device, the DRM proxy interfacing the media server and a player configured to implement the HLS protocol; executing an HLS server in the DRM proxy; registering the DRM proxy to handle HTTP requests; producing by the DRM proxy a playlist in HLS format including a list of URLs locating the individual protected segments on the user device; processing the playlist in the player; in the DRM proxy, acquiring a license to access the protected segment identified by the URL of a current request; decrypting the protected segment in the DRM proxy based on the license; and returning a segment based on the decrypted segment to the player in response to the current URL request.