摘要:
The invention relates to a method for handling data between two memory areas of an electronic component having at least one working memory area for carrying out operations on the component, which bring into play at least some of the data. The same memory areas are used for executing an operation, whatever the operation to be executed is, in such a manner that each operation has a hidden signal trace that is identical in terms of location leakage outside the component.
摘要:
The invention relates to a security token comprising a communication interface adapted to communicate with a host computer; a security module, comprising encryption based security features; and a non volatile memory storing at least an application to be uploaded and executed in a host computer. The application makes use of the security features when executed in a host computer in communication with the communication interface. The security token is adapted to modify the content of the application as uploaded or its execution parameters at successive connections of the security token to a host computer.
摘要:
A method of recovering vapor emitted in a liquid dispensing installation comprising: liquid dispensing means (P.sub.L) adapted to cause said liquid to flow with a liquid flowrate Q.sub.L ; vapor recovery means (P.sub.V) adapted to cause said vapor to flow with a vapor flowrate Q.sub.V along a pipe (120), said vapor flowrate Q.sub.V being controlled by a parameter G. According to the invention, the method includes the following steps: establishing an equation G=F (Q.sub.V, {p.sub.i }) relating the parameter G to the vapor flowrate Q.sub.V and to parameters p.sub.i characteristic of the recovery means and said pipe (120); determining an initial value {p.sub.i }.sub.o of the parameters p.sub.i ; on each dispensing k of liquid: measuring the liquid flowrate Q.sub.Lk and determining a value G.sub.k of the parameter G from the equation:G.sub.k =F (Q.sub.Lk, {p.sub.i }.sub.k-1);determining a new value {p.sub.i }.sub.k of the parameters p.sub.i to be used for the next dispensing k+1 of liquid. Application to dispensing fuel for motor vehicles.
摘要:
When a hydrocarbon liquid is pumped (11) for retail delivery, it is degassed by means of a vortex device (13). A control valve (21) shuts off delivery if the gas content in the degassed liquid being delivered via a main duct (16) is too high. Unlike prior systems which sense gas content only in the liquid being delivered, the present invention senses the greater gas content in the recycled gas-enriched fraction from the vortex separator device (13). This is done by means of a venturi system (19) controlling a servo-valve (25) which in turn controls the control valve (21). By using a magnified image of the gas content, the system is made more sensitive and more reliable.
摘要:
The device comprises a scale (1) and a slide (2) which are provided with electrodes arranged to form two pairs of capacitances for the measurement of the displacement of the slide on the scale (CA.sub.1 -CA.sub.2, CB.sub.1 -CB.sub.2). These measurement capacitances are connected to an electronic feed and processing circuit (3) in which they are connected in a bridge (4A, 4B) with switched reference capacitances of MOS type. In this circuit, the outputs of these bridges are connected via comparators (5A, 5B) to a processor (6) of CMOS type adapted to produce a terminal digital measurement signal by counting the periods of the signal of the measurement capacitances and by numerical interpolation within each of these periods. This interpolation is effected by balancing the capacitive bridges by means of a digital algorithm.
摘要:
Method of securing exchanges between two electronic devices, by using an imprint of at least one of the two devices. This imprint is obtained on the basis of all or part of the electronic components of which this device is composed. This imprint will serve, either to protect the confidentiality of the data exchanged, or to attest to the identity of the device issuing the data.
摘要:
The invention relates to a security token comprising a communication interface adapted to communicate with a host computer; a security module, comprising encryption based security features; a non volatile memory storing at least an application to be uploaded and executed in a host computer. The application makes use of the security features when executed in a host computer in communication with the communication interface. The security token is adapted to modify the content of the application as uploaded or its execution parameters at successive connexions of the security token to a host computer.
摘要:
Method of securing exchanges between two electronic devices, by using an imprint of at least one of the two devices. This imprint is obtained on the basis of all or part of the electronic components of which this device is composed. This imprint will serve, either to protect the confidentiality of the data exchanged, or to attest to the identity of the device issuing the data.
摘要:
A lubricating system for the pump of the vapor recovery circuit of a nozzle for dispensing a hydrocarbon. The lubricating system comprises a capillary pipe which takes off a small flow of hydrocarbon from the main pump of the feedpipe and feeds it to the inlet of the vapor recovery pump.
摘要:
In a double correlation device incorporated in a radar installation for muring distance, the transmitted high-frequency signal is modulated, by frequency displacement, by a series of pseudo-random pulses. The first correlation is carried out between each pulse of the series and a delayed version of the series, the delay being chosen to correspond to the distance zone to be swept. The resulting signal undergoes a second correlation with the signal received after reflection from the target and controls a switch in order to deduce information on the distance investigated.