EP1104496B1 - Zugangskontrollvorrichtung zwischen einem elektronischen schlüssel und einem elektronischen schloss - Google Patents

Zugangskontrollvorrichtung zwischen einem elektronischen schlüssel und einem elektronischen schloss Download PDF

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Publication number
EP1104496B1
EP1104496B1 EP99936707A EP99936707A EP1104496B1 EP 1104496 B1 EP1104496 B1 EP 1104496B1 EP 99936707 A EP99936707 A EP 99936707A EP 99936707 A EP99936707 A EP 99936707A EP 1104496 B1 EP1104496 B1 EP 1104496B1
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EP
European Patent Office
Prior art keywords
lock
key
access control
electronic
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP99936707A
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English (en)
French (fr)
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EP1104496A1 (de
Inventor
Patrick Langlet
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Ministere des PTT
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Ministere des PTT
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    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C2009/00634—Power supply for the lock
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C2009/00753—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys
    • G07C2009/00769—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means

Definitions

  • the present invention relates to a device for access control between an electronic key and lock, or, more generally, between a portable object and a fixed object, provided with control functions access and playing the role of a key and a lock e.
  • Enclosure access control systems closed to protect and protect fiduciary values have given rise to many developments to date. This is particularly the case with regard to concerns mailboxes for which systems opening - mechanical closing then, more recently, electronic, for speakers protected, have been implemented.
  • the aforementioned mechanical systems do not allow to provide a satisfactory level of security.
  • the degree of security relies, in this case, on the degree of complexity manufacturing the key, which is likely to be reproduced. In addition, if such a key is stolen, invalidation of the latter, or a reproduction of this can only be achieved by a modification adequate set of locks associated with this key.
  • the remote key supply process by the lock poses maintenance constraints, change or recharging electrical energy resources, or of implementation, integration of an electrical energy source at the lock level, in particular, when the number of locks is important as in the case of boxes urban letter writing, for example.
  • the object of the present invention is to remedy the aforementioned drawbacks of mechanical and electronic systems of the prior art by the implementation of a device of access control between a key and a lock electronic in which any presence of a source electrical energy at the electronic lock, if necessary the fixed base of the support for this lock electronic, can be deleted.
  • Another object of the present invention is, in consequence, the implementation of a control system of access between an electronic key and lock in which any periodic change or intervention recharging of an electrical energy source at the electronic lock can be removed.
  • Another object of the present invention is also the implementation of an access control device between an electronic key and lock allowing, in link with the energy supply process of the device, the implementation of control protocols high security access.
  • Another object of the present invention is also the implementation of an access control device between an electronic key and lock allowing the implementation of an access control process by exchange of digital data between the key and the lock electronic, in the absence of any electrical contact between the electronic key and lock.
  • Another object of the present invention is finally the implementation of an access control device between an electronic key and lock in which the process supply of electrical energy to the device is implemented in the absence of electrical contact between the electronic key and lock.
  • this electronic key comprising at least one electrical energy source, a logical unit of calculation of key, a module of emission - reception of signals of key access control and this electronic lock comprising at least one logical unit for calculating a lock and a transmission module - reception of control signals lock access for the implementation of a security protocol access control between this electronic key and lock
  • the key electronics also includes a generator module power signal supplied by the electric power source and controlled by the logical key calculation unit and a key transfer module for control signals key and lock access and power signal
  • the electronic lock comprises additionally a signal lock transfer module key and lock access control and signal power and an energy storage module carried by the power signal, which provides unidirectional energy transfer electric carried by the power signal of the key electronic to electronic lock and transfer bidirectional key access control signals and between the electronic key and the electronic lock.
  • the access control device between a key and an electronic lock finds application in the production industry and the management of fiduciary security vaults, in particular mailboxes, and access control high security in general.
  • the electronic key 1 comprises at least one source of electrical energy 1 0 , this source consisting for example of a storage battery with which is associated a battery management module, this module management can present, in a manner known as such, more or less elaborate functions for managing the energy contained in the storage battery. For this reason, the storage battery management module will not be described in detail in the present description.
  • the electronic key 1 also includes a module for transmitting - receiving 1 2 of key access control signals.
  • This module 1 2 may comprise, advantageously, a transmission module of key access control signals and a module for receiving the lock access control signals, these signals being transmitted digitally, as well as 'It will be described in more detail later in the description.
  • the key access control signals designate the access control signals emitted by the key towards the lock
  • the lock access control signals designate the access control signals emitted by the lock towards the key.
  • the electronic key 1 finally comprises a logical key calculation unit, bearing the reference 1 1 , this logical unit being responsible for controlling all of the operating operations of the electronic key.
  • the electronic lock 2 comprises at least one logic unit for calculating a lock, bearing the reference 2 1 , and a transmission / reception module 2 2 of lock access control signals.
  • the logic unit for calculating the lock 2 1 also makes it possible to control all of the operating operations of the electronic lock 2.
  • the transmission module - reception 1 2 of the key access control signals, the transmission module - reception 2 2 of the lock access control signals allow the implementation of an access control protocol between the key and the electronic lock 1, 2 above.
  • the access control device object of the present invention, further comprises, at the level of the electronic key 1, a module generating a power signal, bearing the reference 1 3 , this generator module being supplied by the electrical energy source 1 0 and being able, of course, to be controlled by the logical key calculation unit 1 1 .
  • a module generating a power signal bearing the reference 1 3
  • this generator module being supplied by the electrical energy source 1 0 and being able, of course, to be controlled by the logical key calculation unit 1 1 .
  • all of the functional modules for managing the battery 1 0 , transmitting - receiving 1 2 of key access control signals and power generator 1 3 are connected by a link to the logical calculation unit. 1 1 key and controlled by the latter.
  • the electronic key 1 comprises a key transfer circuit, bearing the reference 1 4 , key access control signals and lock as well as, in accordance with a particularly aspect advantage of the access control device, object of the present invention, of the power signal generated by the generator module 1 3 . More specifically, it is indicated that the aforementioned key transfer circuit 1 4 is connected, on the one hand, to the module generating the power signal 1 3 and, on the other hand, to the transmission - reception module of key access control signals 1 2 under conditions which will be explained in more detail later in the description.
  • the electronic lock 2 comprises, for the purpose of constituting the access control device, object of the present invention, a circuit for transferring the lock of the access control signals from key and lock and the aforementioned power signal.
  • This lock transfer circuit has the reference 2 4 .
  • the electronic lock 2 also includes a module 2 5 allowing the storage and therefore the recovery of the electrical energy conveyed by the power signal.
  • the lock 2 can, as shown in a nonlimiting manner in FIG. La, be further provided with a module for recovering a clock signal, bearing the reference 2 3 , this clock signal being able to be recovered at starting from the power signal, as will be described in a nonlimiting manner later in the description.
  • the functional modules constituting the electronic lock 2 that is to say the transmission module - reception of the lock access control signals 2 2 , the electrical energy storage module 2 5 and, where appropriate, the clock recovery module 2 3 , are connected via a link to the logic unit for calculating the lock 2 1 .
  • the lock transfer circuit 2 4 it is indicated that the latter is of course connected, on the one hand, to the transmission - reception module 2 2 of the lock access control signals, and, d on the other hand, to the module 2 5 for storing electrical energy as well as, if necessary, to the module 2 3 for clock recovery, as will be described in more detail later in the description.
  • control device access object of the present invention, allows the implementation work of an access control protocol in which are carried out, on the one hand, a unidirectional transfer of the electrical energy carried by the power signal from the electronic key to the electronic lock, and, on the other hand, the bidirectional transfer of signals from key and lock access control between the electronic key 1 and the electronic lock 2, as it will be described below.
  • the key transfer circuit 1 4 and the lock transfer circuit 2 4 are advantageously constituted by at least one primary winding and at least one secondary winding of a transformer.
  • the primary windings, denoted L 1 , and secondary, denoted L 2 are then electromagnetically coupled when the electronic key and the electronic lock are brought into contact, this bringing together being carried out to make an attempt access.
  • the operating mode of the access control device, object of the present invention, as shown in FIG. 1a, can be illustrated, by way of nonlimiting example, as shown in Figure 1b.
  • the lock 2 does not has no permanent source of electrical energy, the entire transfer of electrical energy from the key electronic with electronic lock to provide the necessary electrical energy needs, so to conduct the access control protocol in accordance to the subject of the present invention.
  • the unidirectional transfer electrical energy carried by the power signal from the electronic key to the electronic lock this power signal being noted PS, can be performed prior to bidirectional signal transfer key and lock access control between the electronic key 1 and electronic lock 2.
  • a more elaborate embodiment of the access control device, object of the present invention can consist in providing, at the level of lock 2, a source of auxiliary electrical energy, carrying the reference 2 0 .
  • this auxiliary energy source, at the level of the lock 2 makes it possible to ensure a standby function of the latter.
  • the auxiliary electrical power source 2 0 is adapted so as to allow, at least, the supply of the logic unit for calculating the lock 2 1 as well as the reception part of the transmission - reception module 2 2 , to enable the standby function to be carried out under the authority of the lock calculation logic unit 2 1 .
  • FIG. 2b shows a sequential diagram of an access control protocol implemented by the access control device, object of this invention, represented in FIG. 2a, in the case of the existence of a watch function at the lock 2.
  • the transfer bidirectional key access control signals and lock, or at least part of it, between the electronic key 1 and the electronic lock 2 is made prior to the unidirectional transfer of the electrical energy carried by the power signal PS from electronic key 1 to electronic lock 2.
  • lock 2 can thus transmit to the electronic key 1 an identification request message, noted RID.
  • the electronic key 1 can transmit a MID identification message to lock 2 and, on identification criterion satisfied with this identification message, lock 2 transmits in response a message from identification response to electronic key 1, this message being denoted ACKID in Figure 2b.
  • This accused message can then allow the conduct of the unidirectional energy transfer process via of the PS signal between the electronic key 1 and the electronic lock 2. Under these conditions, the transfer unidirectional energy is achieved conditionally at least two-way transfer success partial data during the standby function.
  • the control protocol access in accordance with the object of the present invention, can then be chased between the lock electronic 2 and electronic key 1 according to a process specific access control consisting of a succession to exchange messages, encrypted or not, the key electronic 1 and the electronic lock 2 can be provided with encryption means - decryption, as well that it will be described in more detail later in the description.
  • the signal PS power in this embodiment advantageous, consisting of an asymmetrical periodic signal and therefore comprising substantially a half period of high amplitude, amplitude denoted M, and a half period of low amplitude, noted m.
  • the transfer unidirectional energy between the key and the lock electronic can advantageously be performed on a plurality of half periods of high signal amplitude PS power, one-way transfer step energy key / lock bearing the reference 1 in the figure 3a.
  • the number of successive half amplitude periods high during which the unidirectional transfer of energy between the electronic key 1 and the electronic lock 2 is performed can then be calculated based of the total energy required to drive the Bidirectional data transfer between the electronic key 1 and the electronic lock 2 for implementation of the access control protocol itself by transfer bidirectional key / lock data, as shown in figure 1b this step bearing the reference 2 in Figure 3a.
  • the unidirectional transfer electrical energy carried by the signal PS power and bidirectional signal transfer key and lock access control can be alternately performed over substantially half a period of high amplitude and substantially half a period of low amplitude respectively.
  • step 1 of unidirectional energy transfer key / lock is sort of distributed on all half periods of high amplitude of the power signal PS
  • step 2 of bidirectional transfer from key / lock data is itself distributed over the half periods of low amplitude, the stages of transfer unidirectional key / lock energy and bidirectional transfer of key / lock 2 data then being nested as shown in Figure 3b, and performed alternately.
  • An access control protocol corresponding will be described in more detail later in the description.
  • the electronic key can be produced in the form of a block of molded material, bearing the reference B 1 , the block of molded material being for example injected around a printed circuit board, denoted PIC. 1 , on which are mounted the various functional modules previously mentioned in the description in conjunction with FIGS. 1a or 2a, these functional modules bearing for this reason the same references and being represented, as well as the printed circuit board, in dotted lines.
  • the block B 1 constituting the body of the electronic key can then be provided for example with an on / off switch, noted ON / OFF, as well as with a serial or parallel interface, noted PI, this interface serial or parallel being connected, by a link by BUS, to the logical unit for calculating key 1 1 , in order to allow for example the programming of the aforementioned electronic key.
  • This programming can also be carried out via the primary winding of the transformer.
  • the logic unit key of track 1 consisting for example a microcontroller, associated with conventional elements such as RAM and ROM, not shown in the drawings. Specific programs such as programs for conducting the access control protocol in accordance with the object of the present invention can be stored in the ROM.
  • the electronic key 1 notably comprises the module generating the power signal PS, referenced 1 3 , and of course the key transmission-reception module 1 2 , the assembly being controlled by the key calculation unit 1 1 .
  • the implementation of the access control protocol of the device, object of the present invention can be achieved by simple commissioning of the power supply for all of the aforementioned functional modules.
  • the operation of the module generating the power signal 1 3 triggered by this start-up can then be free, that is to say in the absence of effective control of the logic calculation unit of key 1 1 , as will be described later in the description. In such a case, however, the power signal generator module is not connected to the key calculation logic unit.
  • the key transfer circuit 1 4 of the key and lock access control signals it is indicated, as shown in FIG. 4a above, that this can be achieved by means of a winding. 140 mounted on a sleeve 141 shown projecting in FIG. 4a, this sleeve being implanted in the injected block B 1 , which ensures a suitable mechanical maintenance of the assembly constituted by the sleeve 141 and the winding 140.
  • the connection of the winding 140 to the power signal generator module 1 3 and the key transmission-reception module 1 2 is produced by a wired link, which is also embedded in the injected block B 1 .
  • the housing B 1 can be provided with an inspection hatch, denoted TV, allowing access to the accumulator battery constituting the electrical energy source 1 0 .
  • the winding 140 is itself formed by contiguous turns by means of an electrically insulated copper wire.
  • the sleeve 141 is advantageously made of a magnetic material such as a ferrite rod for example.
  • a comparable embodiment can be envisaged from a housing B 2 made of molded injected plastic material, this housing B 2 being integrated into the letter box or to the BL enclosure, access to which is reserved.
  • the housing B 2 can, in the same manner as in the case of FIG. 4a, be injected around a printed circuit board PIC 2 comprising all of the functional modules represented in FIGS. 1a or 2a, 2 1 , 2 2 , 2 3 and 2 5 , if applicable 2 4 and 2 0 .
  • a manufacturing method can then consist in providing the printed circuit board PIC 2 with a notch, denoted ENC, in which the lock transfer circuit 2 4 is mounted.
  • the key transfer circuit 2 4 is constituted by a winding with contiguous turns, which is fixed and maintained in the notch ENC and suitably connected to the functional modules 2 3 , 2 5 and 2 2 previously mentioned in the description.
  • the injection of the housing B 2 then makes it possible to obtain a compact block and a cylindrical cavity 241 can then be produced by suitable bore, subject to the usual precautions, in order to produce a suitable cylindrical cavity.
  • the hollow tube and / or the cavity 242 can for this purpose be made of a magnetic ferrite material such as the sleeve 141 relative to FIG. 4a.
  • both of electronic key and lock can be considered.
  • the male character of the key represented by the protruding sleeve 141 in FIG. 4a
  • the female character of the lock represented by the cavity 241
  • the sleeve 141 and the cavity 241, as well as the hollow tube 242 can have a section of revolution, circular, or polygonal.
  • the electrically insulated copper wire making it possible to carry out the winding 140 and the winding 240 of the key and lock transfer circuits, was a copper wire with a diameter of 0.5 mm, the sleeve 141 had a total length of 30 mm, the part of the protruding sleeve emerging from the housing B 1 over a length of 25 mm.
  • the diameter of the assembly constituted by the sleeve 141 and the winding 140 had a value of 11 mm.
  • this cavity With regard to the cavity 241, this being provided with the hollow tube 242 as shown in FIG. 4b, this cavity had an inside diameter dimension 11 mm, allowing the insertion of the protruding sleeve of the same dimension.
  • the implementation of the cavity 241 is not limited to an implementation by boring. Indeed, it is also possible to perform the injection of the material constituting the block B 2 around the printed circuit board PIC 2 by introducing into the coil 240 a rod of suitable diameter. The removal of the rod then makes it possible to form the aforementioned cavity 241. This operating mode then makes it possible to adjust the thickness of injected material separating the winding from the cavity thus produced, which makes it possible to improve the coupling of the windings 240 and 140 when the key and the lock are brought into contact.
  • FIG 4c there is shown, in a sectional view, the relative position of the electronic key and the electronic lock when the key is placed in the presence of the lock to perform an access attempt.
  • the windings 140 and 240 constituting the key transfer circuits, respectively of the lock are placed opposite, the positioning of the latter being established accordingly.
  • a specific, non-limiting embodiment may consist, at the level of the lock, of providing separate windings for the energy recovery module 2 5 and for the transmission-reception module 2 2 , these two modules being then completely separated.
  • the source of electrical energy 1 0 can be constituted by a rechargeable battery.
  • This battery can be a battery of the type intended for portable telephones, with a nominal voltage of 4.8 V and a capacity of 600 mAh.
  • the storage battery can be recharged by electrical contact from external terminals accessible, for example at the parallel interface, or, if necessary, via the contactless connection of the key, i.e. via the transfer circuit 1 4 .
  • the battery management module can then manage the recharging operation.
  • the stop / start button ON / OFF has the effect of powering the circuits other than any circuits that are continuously powered, such as a real-time clock for example.
  • Another solution may be to implements an automatic start / stop following automatic detection of a lock by the key.
  • a such function can be realized, by electromagnetic detection the presence of the key and a lock for example.
  • the module of battery management represented in FIG. 1a or 2a, can incorporate such a detection system in order to proceed when the battery is switched on / off for ensure the supply of the whole.
  • the above function can also be implemented by detecting a significant variation in electrical impedance seen at terminals of the winding of the key, when contacting electronic key and lock.
  • the logical key calculation unit 11 As regards the logical key calculation unit 11 , it is indicated that this is constituted by a microcontroller, or microprocessor, with which is associated an external oscillator of the quartz oscillator type for example. Such an associated system, known as such, will not be described in detail nor shown for this reason in the drawings.
  • the crystal oscillator / microcontroller assembly from an oscillation frequency of 4 MHz, makes it possible to deliver a so-called carrier signal by frequency division at 250 kHz for example. This carrier is used for the transmission of electrical energy from the key to the lock and, in particular, for the constitution of the power signal PS.
  • this comprises a current amplifier device constituted by two bipolar transistors Q 1 and Q 2 connected in follower elements between the supply voltage VCC and the reference voltage denoted 0, the bases and the emitters of these transistors being connected together, these transistors being of opposite conduction type.
  • the base of the aforementioned transistors receives the aforementioned carrier signal, delivered by the key calculation logic unit 1 1 and delivers a signal amplified in current, which corresponds substantially to a square signal at the frequency of 250 kHz.
  • the power module 1 3 also comprises a MOS transistor of the FET type, referenced M 1 , connected between the reference voltage and the winding 140, denoted L 1 , of the transfer circuit 1 4 of the power signal PS and the control signal access key and lock.
  • the MOSFET transistor M 1 is connected in series with the above-mentioned winding L 1 and the gate of the transistor M 1 is connected to the amplified carrier signal delivered by the bipolar transistors Q 1 and Q 2 .
  • the drain electrode of the MOSFET transistor M 1 is thus connected in series with the winding constituting the inductance L 1 , which itself is connected in series with a load resistance R 1 of low value connected to the supply voltage. Vdc.
  • the resistor R 1 as represented in FIG. Sa constitutes a load resistor for the MOSFET transistor M 1 constituting an element of the transmission part of the transmission-reception module 1 2 of the key electronic, as will be described in more detail later in the description.
  • the command applied to the gate electrode of the MOSFET transistor M 1 ensures alternating switching of the latter, this transistor causing the passage of a current in the inductance L 1 , which, when it is in the presence of the 240 corresponding winding of the lock, in fact constitutes a transformer therewith.
  • the blocking of the transistor M 1 then causes the appearance of an overvoltage on the drain electrode of the latter and, consequently, on the windings of the aforementioned transformer.
  • the MOSFET transistor M 1 is chosen so as to have a series resistance in conduction of less than 0.5 Ohm, a breakdown voltage of the order of 100 V and an admissible peak current of the order of 25 A, in order to d '' ensure correct operation of the switching transients.
  • the transistor M 1 MOSFET When the transistor M 1 MOSFET is conductive, the voltage across the primary of the transformer, that is to say of the inductance L 1 , is close to the supply voltage Vcc whereas, when the conduction, the overvoltage that appears on the same inductor L 1 is transmitted to the inductor L 2 formed by the coil 240 at the lock.
  • the aforementioned received voltage, at the lock, is therefore asymmetrical and the amplitude generated during the blocked alternation of the MOSFET transistor M 1 is greater than that generated during its alternation in conduction.
  • the bidirectional transmission of key and lock access control signals between the electronic key and the electronic lock is carried out, at the level of the electronic key 1, by virtue of the transmission part and the reception part of the module 1 2 d ' transmission-reception, and, at the level of the electronic lock 2, thanks to the transmission part and to the reception part of the transmission-reception module 2 2 .
  • the emission part of this module 1 2 comprises, in addition to the resistance R 1 already mentioned, a MOSFET transistor, referenced M 2 , including the drain and source electrodes are connected in parallel on the aforementioned resistor R 1 .
  • the gate electrode of the MOSFET transistor M 2 is controlled by a current amplifier, of structure similar to that described above, and constituted by the bipolar transistors Q 3 and Q 4 , the common base electrode of which is controlled by the output of the logical calculation unit 11 , that is to say of the microprocessor or the microcontroller.
  • This output then delivers a signal representative of the bits of the key access control signals, that is to say of the access control signals emitted by the key towards the lock.
  • the common point of the transmitters of the transistors Q 3 and Q 4 delivering a signal amplified in current representative of the transmission of the data, that is to say of the key access control signal, then controls the gate electrode of the MOSFET transistor M 2 .
  • the data signals causes, by means of the current amplifier constituted by the transistors Q 3 and Q 4 , a switching of the MOSFET transistor M 2 and, consequently, an all-or-nothing modulation of the load, that is to say of the resistance R 1 , seen by the inductance L 1 .
  • the aforementioned inductance constituting the primary circuit of the transformer is then charged by a variable impedance according to the binary information transmitted. The effect of this process is to modulate the power output impedance seen by the transformer primary, this type of modulation being close to an amplitude modulation of the carrier.
  • the MOSFET M 2 may have characteristics similar to those of the MOSFET M 1 , with however a lower maximum admissible current not exceeding one ampere. Under these conditions, the transmission bit rate is 9,600 baud.
  • the binary information of the key access control signal is coded in a Manchester code for example, the useful bit rate of the information then being 4,800 baud.
  • the reception part of the transceiver module 1 2 it is indicated that this part is directly connected to the common point of the resistor R 1 and the inductor L 1 previously mentioned. This common point delivers a received signal, that is to say the lock access control signal when it is emitted by the lock.
  • the signal received is the image of the current consumed in lock 2, that is to say in fact the image of the load modulation brought into the lock in a manner similar to that which is carried out at the level of the key previously. described in the description.
  • the reception part of the transceiver module 1 2 is connected via a capacitor C 1 to the aforementioned common point R 1 L 1 and an inhibition circuit Q 5 , Q 6 and R 2 , R 3 .
  • a resistance bridge R 4 , R 6 , R 7 and a decoupling capacity C 2 make it possible to fix the DC component of the received signal at the value half of the supply voltage Vcc.
  • the capacitor C 1 / polarization bridge assembly constitutes a high-pass filter.
  • the signal received after alignment at half the supply voltage via the above-mentioned resistance bridge is then subjected to filtering by means of a filtering stage constituted by an operational amplifier A 1 constituting, with the resistors R 5 , R 8 and capacitors C 3 and C 4 , a second order low pass filter of the BUTTERWORTH type.
  • the aforementioned filtering stage is followed by a gain voltage amplifier 10, ie 20 dB, formed by an operational amplifier A 2 and by resistors R 9 and R 10 , a capacitor C 5 being connected in parallel on the resistor R 10 .
  • a shaping comparator A 3 and a resistance bridge formed by the resistors R 4 , R 6 , R 7 and the decoupling capacity C 2 to constitute a reference level as a function of the signal received makes it possible to deliver a bit stream at the reception input of the microcontroller, that is to say of the logical key calculation unit 1 1 .
  • the rest state is fixed by a voltage offset generated by the resistive bridge R 11 , R 12 .
  • the input impedance of the filtering stage is taken high enough not to weaken the useful signal.
  • Capacities C 3 , C 4 and resistors R 5 , R 8 in the filtering stage give the latter a low-pass type structure with a cutoff frequency of 50 kHz.
  • Resistors R 11 and R 12 ensure a shift of the signal to the reference voltage.
  • Comparator A 3 is chosen so as to require a low supply voltage, 3 V, and low consumption.
  • the output delivered by the latter can then be directly connected to the input of the microprocessor, or microcontroller, constituting the logical key calculation unit 1 1 , the resistor R 12a constituting a bias resistance of the output of the comparator.
  • the power recovery modules 2 5 and the reception part of the transmission-reception module 2 2 of the lock 2 are connected to the constituent winding of the transfer circuit 2 4 , key and lock access control signals, that is to say the inductance L 2 mentioned in the description above.
  • the energy recovery module 2 5 As shown in the aforementioned FIG. 5b, the energy is restored from the secondary winding L 2 via a diode bridge, denoted D 1 , D 2 , D 3 and D 4 , mounted symmetrically.
  • the diode bridge is referenced 250.
  • the common point of the diodes D 1 , D 2 is connected to a first terminal of the winding L 2
  • the common point of the diodes D 2 and D 3 is connected to the reference voltage
  • the common point of the diodes D 1 and D 4 delivers, from the secondary of the transformer, that is to say from the winding L 2 , a rectified voltage corresponding to that generated by the switching of the MOSFET transistor M 1 on the primary winding L 1 .
  • the common point of the diodes D 3 and D 4 is connected to a resistor R 15 , load resistor, this resistor itself being connected to the reference voltage by a bipolar transistor Q 8 , which is at rest non-conductive. At rest, the blocking of transistor Q 7 causes that of transistor Q 8 .
  • the other terminal of the secondary winding L 2 is also connected to the common point of the two diodes D 3 and D 4 . It is also connected to a resistor R 15a intended to fix the potential of the winding L 2 when the transistor Q 8 is blocked.
  • the common point of the diodes D 1 and D 4 delivering the rectified voltage is connected to the input of a voltage regulator 251, which makes it possible to deliver a regulated voltage, denoted Vreg, intended to supply the power to the set of circuits of the electronic lock 2.
  • the capacitors C 7 and C 8 are capacitors of high capacity with regard to the carrier frequency and respectively of specific cut-off frequency enabling energy storage at the input and the stabilization of the voltage at the output of the voltage regulator 251.
  • the two half-waves of the signal are then used.
  • the conducting state of the MOSFET transistor M 1 generates a voltage of the order of 8V across the terminals of the secondary L 2 , this voltage source having a low output impedance.
  • the blocked state of the MOSFET transistor M 1 generates a higher voltage, but the Thévenin generator equivalent to the terminals of the inductor L 2 then has a higher output impedance.
  • the recovery of electrical energy from the power signal PS therefore takes place essentially during the half period of high amplitude, this recovery of energy being able to be carried out at 80% within 10% of the start of the duration of the high amplitude half period due to the phenomenon of transient overvoltage generated by the switching of the MOSFET transistor M 1 .
  • FIG. 5c represents the voltage developed on the drain of the MOSFET transistor M 1 , at the common point of the coil L 1 and of the aforementioned MOSFET transistor 1
  • the power signal PS can be represented from FIG. 5c by anamorphosis graph, taking into account the DC voltage Vcc and temporal axis affinity due to the presence of the resistor R 1 .
  • the two alternations of the signal can be used thanks to the diode bridge 250, the diodes used being SCHOTTKY rectifying diodes for example. Due to the equivalent generator speed of each high and low voltage amplitude of the power signal PS, one of the alternations is comparable to a source of high amplitude voltage and impedance and the other to a source. amplitude voltage and low output impedance.
  • the regulator 251 can be chosen as a regulator with a low waste voltage in order to supply the regulated voltage Vreg, which can be taken equal to the voltage Vcc previously mentioned relative to the supply of the electronic key 1.
  • the above-mentioned transmission part circuit further comprises a bipolar transistor Q 7 whose emitter is connected to the voltage supplied regulated Vreg by the regulator 251.
  • the transistor Q 7 is mounted as a common emitter by means of a collector resistor R 14 connected to the reference voltage.
  • the base of the bipolar transistor Q 7 then receives, via a resistor R 13 the binary signal delivered by the logic unit for calculating the lock 2 1 , this binary signal being representative of the data, that is to say say of the lock access control signal delivered by the electronic lock 2.
  • the logic unit for calculating the lock 2 1 can be constituted by a microprocessor.
  • the bit stream delivered on the base electrode of the transistor Q 7 then ensures, through the latter, the switching of the load resistor R 15 on a midpoint of the diode bridge 250, that is to say tell the connection point of the diodes D 4 and D 3 .
  • the load resistor R 15 is switched, a current variation is then induced in the winding L 1 of the electronic key 1 via the transformer. This current variation is transformed into a voltage variation on the resistance R 1 of the load of the winding L 1 above, that is to say at the input of the reception part 1 2 of the transmission-reception module. 1 2 , as shown in Figure 5a.
  • this part is connected to the common point of the secondary winding L 2 and to the common point of the diodes D 3 and D 4 of the diode bridge 250 via a diode D 5 , which has characteristics similar to those of diode D 1 .
  • the information transmitted by the electronic key 1 is perceived by the electronic lock 2 as an amplitude modulated signal. Consequently, the useful signal is not taken at the output of the diode bridge, common point of the diodes D 1 , D 4 of the diode bridge 250, because this signal is distorted by the filtering and regulation capacities associated with the regulator. 251, namely capacities C 7 and C 8 .
  • the received signal is taken at the midpoint of the aforementioned diode bridge 250 and in particular on the branch of the diode bridge 250 which rectifies the alternation of lower amplitude, c ' i.e. the branch D 1 , D 3 or D 2 , D 4 .
  • This alternation corresponds to the conductive state of the MOSFET switching transistor M 1 of the electronic key 1.
  • This alternation is chosen because it is not clipped by the rectification capacities of the lock, the capacities C 7 and C 8 . Under these conditions, the alternation of higher amplitude provides energy as a priority.
  • the two asymmetrical half-waves are rectified, but as long as a too high current consumption by the lock 2 does not intervene, only the half-wave supplying the highest voltage is used to supply the power supply to the lock. Under these conditions, the alternation supplying the lowest voltage can then be used to receive the information delivered by the winding L 1 of the transformer primary, that is to say the key access control signal. .
  • the second branch of the bridge of diodes 250 then supplies current. Operation mode aforementioned may then no longer allow separation to be ensured of energy supply and information by use of signal amplitude asymmetry PS power.
  • the processing chain comprises a demodulation stage formed by the resistor R 16 , the capacitor C 9 and the resistor R 17 .
  • This demodulation stage performs an amplitude demodulation at the cutoff frequency of 50 kHz and plays the role of a low-pass filter.
  • C 10 is a bonding capacity.
  • An inhibition circuit formed by the transistors Q 5 , Q 6 and the resistors R 2 , R 3 similar to the inhibition circuit of FIG. Sa can also be inserted between the capacitor C 10 and the common point of the resistance R 16 of the capacitance C 9 and of the resistance R 17 , as will be described in more detail later in the description.
  • a bias bridge formed by the resistors R 18 , R 20 , R 21 and the decoupling capacity C 11 at the reference voltage makes it possible to adjust the average value of the signal to the value half of the regulated supply voltage Vreg.
  • the aforementioned stage introduces a capacitive bond and constitutes a high-pass filter. For this reason, it is necessary to respect in the binary message an alternation of high and low level, the coding of Manchester coding type being then used.
  • the aforementioned processing chain also includes a second order low-pass 50 kHz filtering stage produced by means of the operational amplifier A 4 , resistors R 22 and R 19 and capacitors C 12 and C 13 .
  • This filtering ensures rejection of the carrier at 250 kHz while maintaining the shape of the square signal.
  • the filtering stage produced constitutes a BUTTERWORTH filter.
  • the aforementioned filtering stage is followed by an inverting amplifier constituted by an operational amplifier A 5 and by the resistors R 23 , R 24 , the capacitor C 15 .
  • a resistance-capacitance filter formed by resistors R 25 , R 26 and capacitance C 14 makes it possible to provide a voltage offset making it possible to assign to a comparison stage, constituted by comparator A 6 , a stable state in the absence of a signal, due to the voltage offset introduced by the above-mentioned resistive bridge.
  • the voltage applied to the positive input of comparator A 6 is substantially equal to half of the supply voltage, that is to say the regulated voltage Vreg.
  • the offset and comparison stage delivers at its output to the microcontroller constituting the logic calculation unit 2 1 of the lock, the key access control signal received by the lock.
  • the clock recovery module 2 3 it is indicated that it can be introduced into the lock in order to allow the generation of a time base punctuating the work of the microcontroller constituting the logical calculation unit 2 1 . It is understood in particular that this time base is obtained by detection of the carrier, that is to say of the power signal PS. This module can be produced from a phase locked loop controlled by the fundamental frequency of the power signal generated by the electronic key 1 in order to generate a frequency multiple of the latter. In the case of the integration of a clock recovery module 2 3 in the lock 2, it is then possible to delete the quartz oscillator normally associated with the logic calculation unit, that is to say tell the microcontroller or microprocessor 2 1 .
  • the embodiment of the key circuits and lock as shown in FIGS. 5a and 5b have enabled, thanks to the adapted choice of physical parameters of components, optimum power transfer and of electrical energy, between the key and the lock, for a impedance brought back by the transformer constituted by the windings L1, L2 between 100 ⁇ and 200 ⁇ .
  • the yield obtained was, under these conditions, equal to 0.76 for a transmitted power of 370 mW. Power values higher transmissions can be obtained.
  • inhibitor circuits can be introduced in order to make the reception part of the key and the lock insensitive, the signals transmitted by the key not being perceived by the latter, and vice versa for the lock, in order to reduce the time of turnaround.
  • the turnaround time is defined as the minimum duration of rests to be respected between the end of a transmission and the start of a reception so as not to cause a collision between the corresponding messages. Thanks to the introduction of inhibition circuits, the turnaround time is reduced from 500 ms to 25 ms. In such conditions, an uninterrupted dialogue between the key and the lock can be carried out.
  • An inhibition circuit formed by the transistors Q 6 and Q 5 and the resistors R 2 , R 3 can thus be introduced at the input of the reception part of the transmission-reception module 1 2 of the key respectively 2 2 of the lock, as previously mentioned.
  • the transistor Q 5 controlling the conduction respectively the non-conduction of the transistor Q 6 to ensure, from a command signal of inhibition circuit SCD respectively of the command signal of the inhibition circuit SCD *, at the time of transmission / reception or reversal switching time, the blocking of the entry of the reception part of the reception transmission module 1 2 of the key respectively 2 2 of the lock is obtained when the transmission part of the transmission-reception module 1 2 of the key respectively the transmission part of the transmission-reception module 2 2 of the lock are active in transmission.
  • the key electronic 1 allows to generate and transmit in a way unidirectional to electronic lock 2 signal of power such as the PS signal including a period is shown in the right part of FIG. 6a.
  • This signal consists of an asymmetrical periodic signal as shown in Figure 5c.
  • the protocol, object of the present invention is to transmit in a step 1000, referenced a), the key electronic 1 to electronic lock 2, the signal of PS power so as to supply over at least a half high amplitude period at electronic lock 2 the electrical energy carried by the power signal during this half period of high amplitude.
  • the power transfer takes place especially in the specific embodiment of figure 5a at 80% during the 10% of the start time of the aforementioned half high amplitude period.
  • step 1000 Associated with step 1000 is a step 1001 also bearing the reference b), for storing the electrical energy carried by the power signal PS, this storage occurring at the level of the electronic lock 2.
  • steps 1000 and 1001 of FIG. 6a can be concomitant, the transmission of electrical energy and storage of this energy at the lock, especially by through the input capabilities of the regulator voltage delivering the regulated voltage Vreg in the case of embodiment of FIG. 5b are substantially concomitant for the duration of the half amplitude period high considered.
  • the steps a) and b), i.e. 1000 and 1001 are shown successive.
  • step 1002 can consist of, either in a complete access control process between the electronic key and the electronic lock, either at a slice of rank r of a control process full access. This process is thus distributed over several successive slices of corresponding rank r and performed for half periods of low amplitude PS power signal.
  • the access control protocol in accordance with the subject of the present invention, comprises in in addition to the steps of memorizing at the electronic key and lock calculation results intermediaries corresponding to the part of the process access control, i.e. to the implementation part for the Tr tranche of access control signals of key and lock.
  • the step of memorizing the results of intermediate calculations is not shown in the figure 6a because it is a classic step in terms of data processing.
  • steps a), b), c), i.e. 1000, 1001, 1002 shown in figure 6a are then repeated on a succession of pairs of half periods of high amplitude and low amplitude of the PS power signal to actually ensure completeness the conduct of the access control protocol.
  • this step or this criterion of test bears the reference 1003.
  • the access control protocol in accordance with the object of the present invention is then terminated by an end step consisting of a referenced access refusal 1004. Indeed, it is thus possible to make access conditional to the enclosure confined to the success of all tranches successive bidirectional transfer of signals from electronic key and lock access control.
  • test 1003 can then be followed of a test 1005 relating to the completeness of the conduct of the access control protocol and achieving this last successfully.
  • the 1005 test is of course performed on positive response to the previous test 1003.
  • the access control protocol object of the present invention
  • the access control process described in the aforementioned document consists, by way of nonlimiting example, in performing in a first tranche, denoted T 1 , a transmission step by the electronic key, noted 1 kj , of an identification request message, noted A ki . This identification request message is transmitted to the lock marked 2 i .
  • the above-mentioned tranche T 1 is followed by a tranche T 2 consisting for example of the transmission of a random variable message, noted a ij , by the electronic lock 2 i to the electronic key 1 kj .
  • This transmission is carried out from the electronic key 1 kj to the electronic lock 2 i .
  • the slice T 3 can then be followed by a slice T 4 , which is then carried out at the level of the electronic lock 2 i from initial validation data V i , this slice T 4 then consisting in a verification of the authenticity the signature value based on specific authentication data.
  • references k and j correspond respectively to an address or physical reference of the key and to a validation address of the key in accordance with the indications given in the aforementioned French patent application.
  • the index i of each electronic lock 2 i corresponds to a physical address assigned to the corresponding electronic lock.
  • signature calculation operations C i and signature calculation verification are carried out for example using private keys K'S and public keys KP, K'P, under the conditions mentioned in the aforementioned French patent application. .
  • an access control device between an electronic key and lock implements a particularly access control protocol efficient insofar as complex operations of encryption - decryption of data can be associated and made conditional on prior operations energy transfer allowing alone empowerment to conduct calculation operations for aforementioned signature and verification.
  • the access control device between a key and an electronic lock and control protocol of access, objects of the present invention appear particularly well suited to managing a number very important electronic locks from a set reduced electronic keys programmed for this purpose. They appear particularly well suited to the mailbox management, especially in rural areas, where mailboxes can be moved away from sources power supply.
  • the access control device between a key and an electronic lock and control protocol access, objects of the present invention can be put implemented to manage reserved access enclosures requiring high security control.

Claims (10)

  1. Vorrichtung zur Zugangskontrolle, die einen elektronischen Schlüssel (1) und ein elektronisches Schloß (2) umfaßt, wobei der elektronische Schlüssel zumindest eine elektrische Energiequelle (10), eine Schlüssel-Logikrecheneinheit (11), ein Schlüssel-Sende-/Empfangsmodul (12) für Schlüssel-Zugangskontrollsignale aufweist, und wobei das elektronische Schloß wenigstens eine Schloß-Logikrecheneinheit (21) und ein Schlüssel-Sende-/Empfangsmodul (22) für Schloß-Zugangskontrollsignale aufweist, um ein Zugangskontrollprotokoll zwischen dem elektronischen Schlüssel und dem elektronischen Schloß auszuführen,
       dadurch gekennzeichnet, daß der elektronische Schlüssel außerdem aufweist:
    Mittel (13) zum Erzeugen eines Leistungssignals, die von der elektrischen Energiequelle gespeist werden, wobei das Leistungssignal aus einem asymmetrischen periodischen Signal mit einer Halbperiode mit hoher Amplitude und einer Halbperiode mit niedriger Amplitude besteht, und
    Schlüssel-Übertragungsmittel (14) zum Übertragen der genannten Schlüssel- und Schloß-Zugangskontrollsignale und des Leistungssignals, und daß das elektronische Schloß außerdem aufweist:
    Schloß-Übertragungsmittel (24) zum Übertragen der genannten Schlüssel- und Schloß-Zugangskontrollsignale und des Leistungssignals und
    Speichermittel (25) zum Speichern der von dem Leistungssignal transportierten elektrischen Energie, wodurch die unidirektionale Übertragung der von dem Leistungssignal des elektronischen Schlüssels transportierten elektrischen Energie zu dem elektronischen Schloß und die bidirektionale Übertragung der Schlüssel- und Schloß-Zugangskontrollsignale zwischen dem elektronischen Schlüssel und dem elektronischen Schloß ermöglicht wird, wobei die unidirektionale Übertragung der von dem Leistungssignal transportierten elektrischen Energie und die bidirektionale Übertragung der Schlüssel- und Schloß-Zugangskontrollsignale abwechselnd über etwa eine Halbperiode mit hoher Amplitude bzw. etwa eine Halbperiode mit niedriger Amplitude durchgeführt werden.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Schlüssel-Übertragungsmittel (14) und die Schloß-Übertragungsmittel (24) aus wenigstens einer Primärwicklung bzw. wenigstens einer Sekundärwicklung eines Transformators bestehen, wobei die Primär- und Sekundärwicklungen elektromagnetisch gekoppelt werden, wenn der elektronische Schlüssel und das elektronische Schloß einander gegenüber gestellt werden.
  3. Elektronischer Schlüssel (1) mit wenigstens einer elektrischen Energiequelle (10), einer Schlüssel-Logikrecheneinheit (11), einem Schlüssel-Sende-/Empfangsmodul (12) für Schlüssel-Zugangskontrollsignale für die Ausführung eines Zugangskontrollprotokolls zwischen diesem elektronischen Schlüssel und einem elektronischen Schloß, ausgehend von Schloß-Zugangskontrollsignalen, die von diesem elektronischen Schloß erzeugt werden,
       dadurch gekennzeichnet, daß der elektronische Schlüssel außerdem aufweist:
    Mittel (13) zum Erzeugen eines Leistungssignals, die von der genannten elektrischen Energiequelle gespeist und von der Schlüssel-Recheneinheit gesteuert werden, und
    Schlüssel-Übertragungsmittel (14) zum Übertragen der Schlüssel- und Schloß-Zugangskontrollsignale und des Leistungssignals, wobei diese Schlüssel-Übertragungsmittel wenigstens eine Spule umfassen, die auf einer Hülse montiert ist und mit den Mitteln zum Erzeugen eines Leistungssignals verbunden sind, und wobei mit Hilfe des Sende-/Empfangsmoduls die unidirektionale Übertragung der von dem Leistungssignal transportierten elektrischen Energie und die bidirektionale Übertragung der Schlüssel- und Schlöß-Zugangskontrollsignale abwechselnd über etwa eine Halbperiode mit hoher Amplitude bzw. etwa eine Halbperiode mit niedriger Amplitude durchgeführt werden.
  4. Elektronisches Schloß (2) mit einer Schloß-Logikrecheneinheit (21) und einem Schloß-Sende-/Empfangsmodul (22) für Schloß-Zugangskontrollsignale zur Ausführung eines Zugangskontrollprotokolls zwischen diesem elektronischen Schloß und einem elektronischen Schlüssel, ausgehend von Schloß-Zugangskontrollsignalen und einem von diesem elektronischen Schloß erzeugten Leistungssignal,
    dadurch gekennzeichnet, daß das elektronische Schloß außerdem aufweist:
    Schloß-Übertragungsmittel (24) für die Übertragung der genannten Schlüssel- und Schloß-Zugangskontrollsignale und des Leistungssignals, wobei die Schloß-Übertragungsmittel wenigstens eine Spule umfassen, die über einem zylindrischen Hohlraum montiert und mit dem Schloß-Sende-/Empfangsmodul für die Schloß-Zugangskontrollsignal verbunden ist, und
    mit der Spule verbundene Speichermittel (25) zum Speichern der von dem Leistungssignal transportierten elektrischen Energie, wobei die unidirektionale Übertragung der von dem Leistungssignal transportierten elektrischen Energie und die bidirektionale Übertragung der Schlüssel- und Schloß-Zugangskontrollsignale abwechselnd über etwa eine Halbperiode mit hoher Amplitude bzw. etwa eine Halbperiode mit niedriger Amplitude durchgeführt werden.
  5. Vorrichtung nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, daß sie einen elektronischen Schlüssel (1) nach Anspruch 3 und ein elektronisches Schloß (2) nach Anspruch 4 umfaßt, wobei die Hülse und der Hohlraum, die die Schlüssel-Übertragungsmittel bzw. die Schloß-Übertragungsmittel bilden, aus einem magnetischen Werkstoff bestehen.
  6. Protokoll für die Zugangskontrolle zwischen einem elektronischen Schlüssel (1) nach Anspruch 3 und einem elektronischen Schloß (2) nach Anspruch 4, wobei der elektronische Schlüssel die Erzeugung und die unidirektionale Übertragung eines Leistungssignals ermöglicht, das aus einem asymmetrischen periodischen Signal mit einer Halbperiode mit niedriger Amplitude und einer Halbperiode mit hoher Amplitude besteht, dadurch gekennzeichnet, daß das Protokoll zumindest darin besteht,
    a) das Leistungssignal von dem elektronischen Schlüssel in der Weise zu dem elektronischen Schloß zu übertragen (1000), daß es über eine Halbperiode mit hoher Amplitude die von dem Leistungssignal während dieser Halbperiode transportierte elektrische Energie an das elektronische Schloß liefert,
    b) die von dem Leistungssignal transportierte elektrische Energie im Bereich des elektronischen Schlosses zu speichern (1001)
    und während der folgenden Halbperiode mit niedriger Amplitude
    c) eine bidirektionale Übertragung von Zugangskontrollsignalen zwischen dem elektronischen Schlüssel und dem elektronischen Schloß nach einem spezifischen Zugangskontrollprozeß durchzuführen, wobei diese bidirektionale Übertragung der Schlüssel- und Schloß-Zugangskontrollsignale ganz oder teilweise dem genannten Zugangskontrollprozeß entspricht.
  7. Zugangskontrollprotokoll nach Anspruch 6, dadurch gekennzeichnet, daß dann, wenn die bidirektionale Übertragung der Schlüssel- und Schloß-Zugangskontrollsignale einem Teil des Zugangskontrollprozesses entspricht, das Zugangskontrollprotokoll außerdem Schritte umfaßt, die darin bestehen,
    d) die dem genannten Teil des Zugangskontrollprozesses entsprechenden Rechenzwischenergebnisse im Bereich des elektronischen Schlüssels und des elektronischen Schlosses zu speichern, und
    e) die Schritte a), b), c) und d) über eine Folge von Halbperiodenpaaren mit hoher Amplitude und mit niedriger Amplitude des Leistungssignals zu wiederholen, um die Vollständigkeit der Ausführung des Zugangskontrollprotokolls zu gewährleisten.
  8. Zugangskontrollprotokoll nach Anspruch 7, dadurch gekennzeichnet, daß der Schritt e), der in der Wiederholung der Schritte a), b), c) und d) besteht, bedingungsweise an ein Kriterium einer Vollständigkeitsprüfung des genannten Teils des Zugangskontrollprozesses gebunden ist.
  9. Zugangskontrollprotokoll nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, daß bei Fehlen einer elektrischen Energiequelle im Bereich des Schlosses die unidirektionale Übertragung der von dem Leistungssignal des elektronischen Schlüssel transportierten elektrischen Energie zu dem elektronischen Schloß vor der bidirektionalen Übertragung der Schlüssel- und Schloß-Zugangskontrollsignale zwischen dem elektronischen Schlüssel und dem elektronischen Schloß durchgeführt wird.
  10. Zugangskontrollprotokoll nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, daß bei Vorhandensein einer zusätzlichen elektrischen Energiequelle im Bereich des elektronischen Schlosses, die die Sicherung einer Überwachungsfunktion ermöglicht, die bidirektionale Übertragung der Schlüssel- und Schloß-Zugangskontrollsignale zwischen dem elektronischen Schlüssel und dem elektronischen Schloß vor der unidirektionalen Übertragung der von dem Leistungssignal des elektronischen Schlüssels transportierten elektrischen Energie zu dem elektronischen Schloß durchgeführt wird, wobei diese unidirektionale Übertragung unter der Bedingung erfolgt, daß die genannte bidirektionale Übertragung, die das Zugangskontrollprotokoll darstellt, Erfolg hat.
EP99936707A 1998-08-13 1999-08-06 Zugangskontrollvorrichtung zwischen einem elektronischen schlüssel und einem elektronischen schloss Expired - Lifetime EP1104496B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9810396A FR2782402B1 (fr) 1998-08-13 1998-08-13 Dispositif de controle d'acces entre une clef et une serrure electroniques
FR9810396 1998-08-13
PCT/FR1999/001953 WO2000009836A1 (fr) 1998-08-13 1999-08-06 Dispositif de controle d'acces entre une clef et une serrure electroniques

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DE69912438D1 (de) 2003-12-04
ATE253164T1 (de) 2003-11-15

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