摘要:
A system for accessing a service comprises two contact-less readers and one portable device. A first contact-less reader is configured to send to the portable device, through a first range radiofrequency link, a first message comprising first data. The first data includes an identifier allocated to the portable device and an associated key for encrypting data. The portable device is configured to send to a second contact-less reader, through a second range radiofrequency link, a second message comprising second data. The second data includes the identifier received from the first message. The second data is encrypted by using the data encryption key received from the first message. The second range radio frequency is higher than the first range radio frequency.
摘要:
The invention relates to a communication system comprising a terminal (10), a first device (1) adapted to exchange data with said terminal (10), a second device (2) adapted to exchange data with said terminal (10), characterized in that it comprises means for pairing said first (1) and second (2) devices so as said second device (2) exchanges data with said terminal (10) through said first device (1).
摘要:
The invention is a method of managing a NFC transaction between two hosts and a reader device. The two hosts are embedded in NFC devices and are intended to be identified by the reader device during an anti-collision phase through a first identifier and a second identifier respectively. The first identifier comprises a variable part. The method includes the steps of generating the first identifier, the variable part of the first identifier and the second identifier comprising a common pattern, looking for a common pattern into the first and second identifiers on the reader device side, and if a common pattern is found and if the variable part of the first identifier comprises said common pattern, concluding that the first and second hosts are embedded in a unique NFC device.
摘要:
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.
摘要:
The system comprises a terminal (10, 12), an independent portable device (20) including a data processing means, and a wireless coupling means (RF COMMUNICATION) for exchanging individual-identification data between said terminal and said portable device. A body-medium communication means (OSC COMMUNICATION) including a transmitter in the terminal and a receiver in the portable device is provided to transmit from the terminal to the portable device a connection code (CONNECTION CODE) at the onset of a transaction upon physical contact established by the individual between the terminal and the portable device. A control means in the portable device checks said connection code received and conditionally issues to the terminal through said wireless coupling means (RF COMMUNICATION) a signal for enabling further execution of said transaction in response to said connection code complying with predetermined criteria.
摘要:
The invention relates to a system (10) for decrypting encrypted audio and/or video data. The system includes a terminal (13) and at least one portable object (14). The terminal and/or the portable object include means for receiving ciphered audio and/or video data from outside the system, means for determining at least one decrypting key, and means for decrypting the encrypted audio and/or video data. Said at least one decrypting key is necessary for decrypting the encrypted audio and/or video data. According to the invention, the terminal and at least one portable object each include at least one contactless communication interface for exchanging data relative to at least one decrypting key, encrypted audio and/or video data and/or decrypted audio and/or video data. The invention also relates to a corresponding portable object and to a corresponding terminal.
摘要:
A two-way communication device has a master transmitter (SysM1, TRM1, SysM2, TRM2) connected to at least one slave transmitter (SysS1, TRS1, SysS2, TRS2) by an active connection wire. The master transmitter and the slave transmitter have a common reference (GND). The master transmitter can transmit a master signal (S1) to the slave transmitter and the slave transmitter can transmit a slave signal (S2) to the master transmitter. The master signal (S1) is a digital modulation in voltage. The slave signal (S2) is a digital modulation in current.
摘要:
A technique for providing short circuit protection in electrical systems used in hydrocarbon exploration and production and, more particularly, for such electrical systems comprising serially connected nodes, includes an apparatus and method. The apparatus, includes a power supply and a plurality of electrically serially connected application sensors downstream from the power supply. Each application sensor includes a sensing element; and a plurality of electronics associated with the sensing element. The electronics shut off upstream power to the downstream application sensors in the presence of a short circuit. The method includes serially supplying power to a downhole apparatus comprising a plurality of electrically serially connected downhole sensors; sensing, in series and upon receiving power from upstream, at each downhole sensor whether a downstream short circuit exists; and shutting off upstream power to the downstream downhole sensors in the presence of a short circuit.
摘要:
This invention proposes a method to obtain the cost of transmitting a set of data from a transmitting means (2, 3, 16) to a receiving means (2, 3, 16) via a network (4), which consists of creating and sending with the set of data itself a data item, called a ticket (19, 23), used to determine the volume and/or the value of said set of data transmitted. Using said ticket, the receiving means can take into account the cost of executing said set of data thereby simplifying the billing. This invention also concerns the systems used to implement said method especially in cellular packet radiocommunication networks.
摘要:
The invention relates to a method for the preselection of at least one application hosted in a secure or non-embedded element in a mobile communication device comprising an NFC system, the said device being capable of accessing and reading data stored in a target NFC system, of the contactless tag or card type, the said NFC system being capable of operating in at least two communication modes including a reader mode, and a card emulation mode, or a Peer-to-Peer mode. When the NFC system is in the reader mode, an application is preselected during a stage wherein data stored in the said target NFC system are read.