Abstract: 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.

Abstract: The invention is aimed at solving the problem of selection of an application and/or configuration in a device of an NFC system having no independent power source or when the power source of the device is temporarily out of operation or does not have an independent power source. To that end, a wireless mobile communication device of an NFC system according to the invention comprises—a sensor of the accelerometer (Ace) type to produce a signal detecting the movement of the said device while the sensor is powered by a field emitted by a coupler close to which the said device is brought,—a processor (Pro) for comparing the said movement detection signal with a predetermined sequence corresponding with an application and/or configuration, and accordingly selecting the said application and/or configuration if the comparison is positive.

Abstract: The invention relates to a system for pairing a terminal with an element worn on the wrist or hand of a user, the element comprising a secure element for communicating with the terminal. According to the invention: the element contains an accelerometer; the terminal includes a means for recording the movements of the element; the system comprises a means for comparing the signature of the accelerometer with that of the recording means of the terminal in order to authorize, if the signatures are similar, the pairing of the terminal with the secure element.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: (EN)The invention relates to a method Method for accessing a service (S) of a service provider (SP 3) by providing anonymously an attribute or a set of attributes of a user determined and stored in an attribute provider (AP 2), comprising a step of processing pairs of public and private keys (KS,KP) of said user in a secure element (SE 1), each public key being used used once and for one set of attributes only for characterised in that it comprises—receiving (S5) by the service provider from the secure element a certificate (CAPKP) delivered by the attribute provider, and a list (LA[Y0]) of attribute values (AY) associated to random values (RandomY) in response to a list of attribute requests (L[Y0]);—determining (S6) by the service provider, digest codes (DiY) associated to said list (LA[Y0]) of attribute values (Ay) and corresponding random values (RandomY), wherein DiY=SHA?2 (Randomy, AY),—extracting data (CAL) from said certificate (CAPKP), accessing to said service (S) if said determined digest codes (Di

Abstract: 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.

Abstract: 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.

Abstract: 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).

Abstract: This invention relates to a method for the transmission using the half-duplex mode of a data signal from a first transmission/reception device to a second transmission/reception device, called the remote device, comprising a logical coding step in which at least two distinct transmission times are associated with two respective statuses of the data signal to transmit. The method is characterized in that it comprises the generation by the first device of a signal (10, 11) comprising, for the transmission of a status of the signal, more or less exclusively a plateau at a first voltage level for the time defined as the transmission time associated with the status to transmit and a falling edge, to the exclusion of any rising edge, the transmission of a data signal status from the second device to the first device comprising the generation of a signal (20, 21) by the second device comprising more or less exclusively a plateau at a second voltage level and a rising edge, to the exclusion of any falling edge.

Abstract: The invention relates to an authentication and/or rights containing retrievable token such as an IC card comprising at least one physical channel of communication to at least one apparatus and at least two logical channels of communication with said at least one apparatus wherein each logical channel of communication is associated with a different execution environment.

Abstract: 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.

Abstract: 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.

Abstract: The invention is aimed at solving the problem of selection of an application and/or configuration in a device of an NFC system having no independent power source or when the power source of the device is temporarily out of operation or does not have an independent power source. To that end, a wireless mobile communication device of an NFC system according to the invention comprises—a sensor of the accelerometer (Ace) type to produce a signal detecting the movement of the said device while the sensor is powered by a field emitted by a coupler close to which the said device is brought, —a processor (Pro) for comparing the said movement detection signal with a predetermined sequence corresponding with an application and/or configuration, and accordingly selecting the said application and/or configuration if the comparison is positive.

Abstract: This invention relates to a method for the transmission using the half-duplex mode of a data signal from a first transmission/reception device to a second transmission/reception device, called the remote device, comprising a logical coding step in which at least two distinct transmission times are associated with two respective statuses of the data signal to transmit. The method is characterised in that it comprises the generation by the first device of a signal (10, 11) comprising, for the transmission of a status of the signal, more or less exclusively a plateau at a first voltage level for the time defined as the transmission time associated with the status to transmit and a falling edge, to the exclusion of any rising edge, the transmission of a data signal status from the second device to the first device comprising the generation of a signal (20, 21) by the second device comprising more or less exclusively a plateau at a second voltage level and a rising edge, to the exclusion of any falling edge.

Abstract: 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.

Abstract: 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.

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: A secure terminal comprises: primary means consisting of processing means, data and program storage means, security means and data input means, wherein the components of the primary means are interconnected by a first data bus; peripheral means consisting of printing means, means for reading from/writing to a card and means for accessing a telecommunications network, wherein the components of the peripheral means are interconnected by a second data bus; and power supply means connected to the primary and peripheral means. The primary means arc grouped in a main housing that cannot be dismantled without damaging at least one of the components of the primary means, and the peripheral means are grouped in at least one housing capable of being connected to the main housing.