EP2584540A2 - Procédé de contrôle d'accès - Google Patents

Procédé de contrôle d'accès Download PDF

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Publication number
EP2584540A2
EP2584540A2 EP12450042.2A EP12450042A EP2584540A2 EP 2584540 A2 EP2584540 A2 EP 2584540A2 EP 12450042 A EP12450042 A EP 12450042A EP 2584540 A2 EP2584540 A2 EP 2584540A2
Authority
EP
European Patent Office
Prior art keywords
access control
control device
wake
signal
electronic key
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.)
Withdrawn
Application number
EP12450042.2A
Other languages
German (de)
English (en)
Other versions
EP2584540A3 (fr
Inventor
Holger Arthaber
Stefan Psaier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EVVA Sicherheitstechnologie GmbH
Original Assignee
EVVA Sicherheitstechnologie GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by EVVA Sicherheitstechnologie GmbH filed Critical EVVA Sicherheitstechnologie GmbH
Publication of EP2584540A2 publication Critical patent/EP2584540A2/fr
Publication of EP2584540A3 publication Critical patent/EP2584540A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • 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
    • G07C2009/00365—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 in combination with a wake-up circuit
    • 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
    • G07C2009/00388—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 code verification carried out according to the challenge/response method
    • G07C2009/00396—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 code verification carried out according to the challenge/response method starting with prompting the keyless data carrier
    • 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
    • G07C2009/00777—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 by induction
    • 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
    • G07C2009/00809—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 through the human body
    • 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
    • G07C2209/00—Indexing scheme relating to groups G07C9/00 - G07C9/38
    • G07C2209/60—Indexing scheme relating to groups G07C9/00174 - G07C9/00944
    • G07C2209/63—Comprising locating means for detecting the position of the data carrier, i.e. within the vehicle or within a certain distance from the vehicle
    • G07C2209/64—Comprising locating means for detecting the position of the data carrier, i.e. within the vehicle or within a certain distance from the vehicle using a proximity sensor

Definitions

  • the invention relates to a method for access control, especially in buildings, in which a bidirectional data transmission between an electronic key and an access control device takes place, wherein the data transmission comprises the transmission of identification data from the electronic key to the access control device, wherein the identification data in the access control device for determining the access authorization be evaluated and depending on the established access authorization, a blocking element for selectively enabling or blocking the access is controlled, wherein the data transmission takes place at least partially via a capacitive coupling between the electronic key and the access control device.
  • the invention further relates to an apparatus for carrying out this method, comprising an access control device and an electronic key, each having a transmitting / receiving device to allow bidirectional data transmission between the electronic key and the access control device, wherein the electronic key storage for identification data which cooperates with the transmitting / receiving device of the key for transmitting the identification data to the access control device, wherein the access control device has an evaluation circuit for determining the access authorization on the basis of the received identification data and the evaluation circuit cooperates with a blocking element for selectively enabling or disabling the access, wherein the transmitting / receiving device of the electronic key and the access control device each have at least one capacitance ve coupling surface having capacitive data transmission module, so that the data transmission can take place at least partially via a capacitive coupling between the electronic key and the access control device.
  • the receiving unit of the access control device has at least one capacitive coupling surface, so that upon contact with the access control device or when approaching the access control device by the person closes an AC circuit and an electrical flow through the access control device arises, which can be detected by the receiving unit.
  • the result of capacitive data transmission is that the electronic key itself does not have to be brought into close proximity to the recipient of the access control device, and no separate activation of the key is required, for example by pressing a button. Rather, it is sufficient if the electronic key is close to the body of the respective user, for example in a trouser pocket, briefcase or the like.
  • the data to be transmitted can be modulated here, for example, to a carrier frequency generated by the electronic key.
  • the user-friendliness of the access control is thereby substantially increased and it is also ensured that a data transfer takes place only when the person carrying the key approaches the access control device or touches it, so that manipulation possibilities by third parties are virtually eliminated. Furthermore, the fact that a low-power, near-field capacitive field is used, the power consumption of the access control system is extremely low, and in particular the power consumption of the electronic key.
  • Electronic keys are understood below to mean different configurations of identification media which have stored an electronic code or identification data, e.g. in the form of cards, key fobs and combinations of mechanical and electronic keys.
  • the electronic key and the access control device require an energy storage for power, in particular a battery. To ensure that the battery-operated components have the longest possible service life until the battery is replaced, efforts are made to minimize energy consumption.
  • a feature for automatic partial shutdown in case of inactivity is also called standby mode, standby mode or sleep mode.
  • sleep mode does not replace the complete switch off of the device, but instead Helps reduce device power consumption during idle time
  • the invention is therefore based on the object to improve an access control method or device of the type mentioned in that energy consumption is reduced and the battery life is increased without the need for a user interaction would be required.
  • a power saving function is thus realized that the electronic key is most of the time in a sleep mode, in which only a receiving circuit is operated, which consumes little power and which is responsible for switching the electronic key in the operating mode, as soon as a wake-up signal of an associated access control device is received by the person carrying the electronic key approaching or touching the access control device.
  • the receiving circuit does not have to be constantly ready to receive. Rather, the receiving circuit may be preferably operated to periodically switch between a receive mode in which it is ready to receive and a sleep mode in which it is not ready to receive during the sleep mode, whereby the power consumption can be further reduced.
  • the receiving circuit may be the transmitting / receiving device of the electronic key, via which the data transmission takes place in the operating mode, or it may be a separate, particularly simple and therefore power-saving circuit, which serves exclusively to receive the wake-up signal.
  • the access control device is notified of the successful wake-up process in that the electronic key transmits an acknowledgment message to the access control device after reaching the operating mode.
  • the wake-up signal is transmitted periodically.
  • the wake-up signal is preferably transmitted several times per second so that the wake-up does not entail a great delay of the access process.
  • the method is developed such that the wake-up signal has frequency and / or amplitude modulations. These are thus impressed in the wake-up signal and serve as recognition features that are recognized by the key, so that not every signal on the wake-up frequency of the key leads to a waking of the key, so that the power consumption of the key can be kept very low.
  • a further reduction in the power consumption of the access control device is preferably achieved by waking up the access control device from a sleep mode in order to enter an operating mode and to send out the wake-up signal.
  • the access control device is thus most of the time in a power-saving sleep mode and is woken up to wake up the electronic key by sending out the wake-up signal.
  • the awakening of the access control device can take place in various ways, wherein it is preferable not to wake up the access control device until a person approaches or touches it.
  • the access control device therefore preferably has a sensor and the access control device is switched to the operating mode upon detection of a significant change in the measured variable of the sensor.
  • the sensor designed as a contact or proximity sensor, in particular as a capacitive touch or proximity sensor.
  • the sensor may also be designed as an acceleration sensor, so that the vibrations which occur when a part of the access control device, for example an actuating element, such as the pommel or the pusher, are touched can be detected.
  • a further reduction in power consumption is advantageous if the wake-up signal is transmitted via a capacitive coupling.
  • the range of the capacitively transmitted wake-up signal is limited to a few meters, in particular to ⁇ 1m, so that the wake-up signal actually only reaches the electronic key (s) that are in close proximity to the access control device. Since the reception of a wake-up signal in the electronic key causes energy consumption, the limited range of the capacitively transmitted signal results in the advantage that no power consumption is caused in keys whose owners have no access intention at all.
  • the wake-up signal can be transmitted via radio waves.
  • a reduction of the energy consumption in the access control device is thereby achieved in that the wake-up signal is emitted via radio waves whose range is less than 2m, preferably less than 1m.
  • the wake-up signal is transmitted bundled over at least one directional antenna. The transmission of the confirmation message from the key to the access control device preferably takes place via radio waves.
  • the transmission characteristics of the respective methods for the location of the electronic key can be used so that the access control device can determine whether the awakened key in their immediate proximity or whether the person carrying the key touches the access control device.
  • the capacitive coupling the data transmission takes place with the aid of an electric field, while the data transmission takes place in the case of radio waves via an electromagnetic field.
  • the fields mentioned have different propagation properties.
  • the electric field used for the data transmission with the aid of the capacitive coupling propagates only a few centimeters, while an electromagnetic field occurring in the radio wave transmission has a much larger propagation field.
  • the electronic key is located in the area in which the two propagation fields overlap.
  • the location of the key can further increase security. This is in particular with regard to the problem that a signal transmitted capacitively from the key may possibly be delayed, so that it can be detected not only in the access control device which touches the person carrying the key, but also in an adjacent access control device. But also with regard to the "man-in-the-middle" problem, where the capacitive transmission of data to the access control device not solely on the person who carries the electronic key with him, but on a standing between the person and the access control device person. Thus, the "man-in-the-middle" would not have to carry a legitimate key in order to gain access, but could touch the access control device with one hand and the person carrying the valid key with the other hand.
  • the location of the person should ensure that the person from whose electronic key the access control device receives data is actually in the immediate vicinity of the access control device.
  • the location is favored in that the access control device emits the wake-up signal via radio waves whose range is less than 2m, preferably less than 1m.
  • the wake-up signal is received only by an electronic key that is within range of the radio signal.
  • a further limitation can preferably take place in that the wake-up signal is transmitted bundled over at least one directional antenna.
  • the procedure is preferably such that the access control device is associated with a door and that the wake-up signal is transmitted and / or received via radio waves directed essentially perpendicular to the door.
  • the access control device is associated with a door and that the wake-up signal is transmitted and / or received via radio waves directed essentially perpendicular to the door.
  • the wake-up signal is transmitted and / or received via radio waves directed essentially perpendicular to the door.
  • only those electronic keys are detected, which are present in the region of the directed substantially perpendicular to the door radio waves. In this way, a targeted location succeeds in a given surrounding area of a door.
  • an identifier is transmitted with the wake-up signal, which is returned with the confirmation message.
  • a device of the aforementioned type is developed in such a way that the electronic key comprises a wake-up circuit for waking up the electronic key from a sleep mode to enter an operating mode, wherein in the access control device a transmitting / receiving device for Transmitting a wake-up signal and in the electronic key a receiving circuit for receiving the wake-up signal during the sleep mode are provided, the receiving circuit cooperating with the wake-up circuit to switch the electronic key from the sleep mode to the operating mode when the receiving circuit receives the wake-up signal.
  • the electronic key has a separate from the receiving circuit transmitting / receiving device, which is designed to exchange data in the operating mode with the transmitting / receiving device of the access control device.
  • the electronic key has processing means which cooperate with the transmitting / receiving device and are set up such that the transmitting / receiving device transmits an acknowledgment message to the access control device after reaching the operating mode.
  • the processing means may for example be formed by a microcontroller known from the prior art.
  • the access control device comprises processing means which cooperate with the transmitting / receiving circuit and are arranged so that the wake-up signal is transmitted periodically.
  • the processing means are set up so that the wake-up signal has frequency and / or amplitude modulations. These are thus impressed in the wake-up signal and serve as recognition features that are recognized by the key, so that not every signal on the wake-up frequency of the key leads to a waking of the key, so that the power consumption of the key can be kept very low.
  • the access control device comprises a wake-up circuit for waking up the access control device from a sleep mode to get into an operating mode.
  • the access control device has processing means which cooperate with the transmitting / receiving circuit and are set up so that the wake-up signal is transmitted after reaching the operating mode.
  • the access control device has a sensor which interacts with the wake-up circuit in order to switch the access control device into the operating mode upon detection of a significant change in the measured variable of the sensor.
  • the senor is designed as a touch sensor, in particular as a capacitive touch sensor.
  • the senor is designed as an acceleration sensor.
  • the receiving circuit during the sleep mode periodically between a receive mode in which it is ready to receive, and a sleep mode in which it is not ready to receive, switched back and forth.
  • the transmitting / receiving device of the electronic key and the access control device each have a radio transmission module and a capacitive data transmission module and a control circuit which is adapted to data depending on control information either via the radio transmission module or via the capacitive data transmission module or to receive or send over both modules.
  • control circuit of the access control device is set up to transmit the wake-up signal via the capacitive data transmission module.
  • control circuit of the access control device is set up to transmit the wake-up signal via radio waves.
  • control circuit of the electronic key is set up to transmit the confirmation message via radio waves.
  • the control circuit of the access control device is set up so that the wake-up signal is transmitted by the transmitting / receiving device of the access control device via radio waves with a transmission power, so that the range of the emitted radio waves is less than 2m, preferably less than 1m.
  • the radio transmission module of the access control device comprises setting means for setting the transmission power.
  • the radio transmission module of the access control device is designed as a directional transmitter.
  • An advantageous embodiment results if at least one electrode of the coupling capacity of the access control device is integrated into an actuating device of the access control device, in particular in a knob or a pusher.
  • FIG. 1 a schematic representation of the operation of a working with capacitive access control device
  • Fig. 2 a simplified equivalent circuit diagram of the training according to Fig. 1
  • Fig. 3 an embodiment in which the data transmission between the electronic Key and the access control device takes place both capacitively and via radio waves
  • Fig. 4 a flow chart of data transmission.
  • Fig. 1 schematically a door with a person opening the door and the individual scattering, loss and coupling capacities are shown.
  • the door is designated 1 and has an access control device 2 with a trained as a knob actuator 3.
  • the person 4 carries an electronic key 5, which may be plugged in a trouser pocket, for example.
  • the electronic key 5 in this case generates a capacitive near field with a carrier frequency to which identification data are modulated.
  • the capacitive near field is coupled to the body surface of the person 4 and forwarded in the sequence to a receiver of the access control device 2.
  • the electronic key 5 has a stray capacitance Cst against the bottom 6.
  • a coupling capacity Ck is observed.
  • the loss capacity Cv between the person 4 and the floor 6 occurs.
  • Cv emulates all the capacitances that result in electrical flows, which do not close from the transmitter via the receiver's receiver capacitor, but pass it and thus contribute nothing to the coupling between receiver and transmitter.
  • Cst simulates the capacitance which is available as the sum for the capacitive coupling of the transmitting electrode to ground.
  • Ck forms according to the capacity, which is available as a sum for the capacitive coupling of the person 4 to the second electrode.
  • Cz simulates the capacities which are available as the sum for the capacitive coupling of the access control device or its locking cylinder to the ground.
  • the access control device again denoted by 2 and has a receiving capacitor 7.
  • the access control device is again denoted by 2 and the electronic key by 5.
  • the access control device 2 comprises a transmitting / receiving device 8 with a control circuit 9, which is responsible for supplying the data to be transmitted either to the radio transmission module 10 or the capacitive data transmission module 11, which transmits the data via radio waves or via a capacitive coupling.
  • the radio transmission module 10 and the capacitive data transmission module 11 each comprise an antenna (not shown).
  • the antenna of the radio transmission module 10 is designed, for example, as a directional antenna.
  • the antenna of the capacitive data transmission module comprises a coupling capacitor, for example in the form of a capacitor with at least one coupling electrode.
  • the from the transmitting / receiving device via a capacitive coupling with the key 5 or via a radio link with Data obtained from the key 5 are supplied to processing means in the form of a microcontroller 12 in which the data is processed.
  • an evaluation circuit 13 is realized, with which it is determined whether the identification data received from the key 5 results in an access authorization. If the access authorization is checked positively, the microcontroller 12 activates a release element 14, so that a locking member of a locking device, not shown, is released.
  • a bidirectional transmission of data between the key 5 and the access control device 2 takes place.
  • a bidirectional connection is, for example, for the wake-up function according to the invention, for the exchange of authentication data in establishing a secure connection between the key 5 and the access control device 2 and for the Exchange of status data and test data od.
  • the data intended to be sent from the access control device 2 to the key 5, e.g. the wake-up signal are generated and conditioned in the microcontroller 12 and fed to the transceiver 8.
  • a matching circuit 15 embodied in the microcontroller 12 is responsible for adapting the data for transmission via the radio transmission module 10 or the capacitive data transmission module 11, which may be necessary, for example, because of the different transmission protocols depending on the module.
  • the signal strength can also be adapted, wherein the matching circuit 15 can in principle also be provided in the transmitting / receiving device 8.
  • the electronic key 5 also has processing means in the form of a microcontroller 16 and one with the Microcontroller 16 connected transmitting / receiving device 17 with a radio transmission module 18 and a capacitive data transmission module 19.
  • the control circuit 20 is responsible for supplying the data to be transmitted either to the radio transmission module 18 or to the capacitive data transmission module 19, depending on the specification.
  • the microcontroller comprises a memory 21 for identification data.
  • the electronic key 5 has a receiving circuit 22, which is simple in construction and therefore consumes very little power.
  • This receiving circuit is either permanently in the ready-to-receive state or switches periodically between a ready-to-receive and a non-ready-to-receive state back and forth.
  • the receiving circuit 22 cooperates with a wake-up circuit 23 which, upon receipt of a wake-up signal by the receiving circuit 22, ensures that the remaining components of the key 5 are woken up, i.e. be switched to the operating mode.
  • the access control device 2 also includes a wake-up circuit 24 which, for example, wakes up the access control device when a touch sensor (not shown) is touched.
  • Fig. 4 shows the sequence of a data transfer.
  • the fitting initially sends a wake-up signal to wake up the identification medium, ie to switch to the operating mode and to determine whether the identification medium is in the vicinity and is ready for operation. As soon as the identification medium detects this signal successfully, it sends an acknowledge signal (ACK) back to the fitting.
  • ACK acknowledge signal
  • fitting identification medium The fitting sends an authentication command to the identification medium ⁇ 1 byte ⁇ SI (RndNrI) 8 bytes
  • the identification medium generates an 8-byte random number (RndNrI), encrypts it with its key SI and sends it to the fitting.
  • the fitting decrypts the received 8-byte data with its key (SB) and also generates another 8-byte random number (RndNrB).
  • the data RndNrI and RndNrB are encrypted and sent to the ID medium ⁇ SB (RndNrI + RndNrB) 16 bytes ⁇ SI (RndNrB) 8Byte o. Error
  • the identification medium decrypts all received bytes and controls RndNrI. If these data have changed, SI and SB are different and the identification medium sends an error message for fitting. If the block RndNrI is correct, RndNrB is sent encrypted back to the fitting. The fitting decrypts the received data and controls it. If the received data equals the generated random number RndNrB, the authentication is complete.
  • both the fitting and the identification medium have successfully recognized that the respective call partner is valid. Incomplete data, too long waiting time for the response and invalid data immediately lead to a communication abort.
  • an 8-byte session key can be generated on both sides. These are generated via a defined calculation algorithm from RndNrI and RndNrB. By using the generated random numbers it is ensured that with each authentication another key is used, which excludes replay attacks and hack attempts to calculate the secret keys SI and SB very elaborately designed.
  • the session key is used to encrypt data in encrypted form (see Fig. 4 "Session"). These are necessary to read or write information such as battery status, keys, etc. and can be expanded as required.
  • a session is terminated by an end-of-session signal (EOS). A disconnect, too long computation times, and too many retries will automatically result in termination of the session. After a termination of the session, as well as an EOS signal as well as an error, the session key must be recreated.
  • EOS end-of-session signal
  • the user wakes up the fitting by touch.
  • the fitting constantly measures the Capacity between a sensor surface and the environment. When touched, this value changes.
  • the sensor surface may be formed, for example, by a conductive component of the knob provided on the fitting, which is separated from another region of the knob by a non-electrically conductive material, whereby a capacitor is formed.
  • the sensor area is thus formed by one of the two electrodes of the capacitor, in particular by one of the two electrodes of the coupling capacitance provided for the capacitive data transmission.
  • the door can only be opened by the user who has previously touched the fitting. Erroneous releases are hereby excluded.
  • the user can wake the fitting by an acceleration sensor. The user touches the fitting and the resulting mechanical shock triggers the awakening process.
  • the identification medium must then be woken up by the fitting. In this case, the fitting emits a specific signal (advantageously radio radiation in the short or microwave range) or else via another physical medium.
  • the identification medium includes a passive receiving circuit which wakes up its internal circuit upon detection of this signal.
  • the disadvantage of this method is that a person without a valid identification medium could touch the fitting with one hand at the same time and a person with authorized identification medium with the other hand ("man-in-the-middle"). This could lead to an unauthorized opening.
  • This case is limited by having suitable radiating and range characteristics of the identity medium wake-up signal the spatial area in which the authorized person is located is limited. If the authorized person is behind the "man-in-the-middle", the identification medium is not woken up due to the weak signal strength. The signal strength is strongly dependent on the environment (eg surrounding metal objects, installation situation / door properties, etc.). Therefore, a calibration is provided, ensuring equal ranges of the media wake-up signal after installation.
  • the fitting sends out a periodic signal.
  • this is a specific signal or physical criterion.
  • the ident medium listens to this signal and wakes up its inner circuit when it is detected.
  • the user does not have to perform a wake-up operation by touch.
  • This procedure leads to a large gain in comfort and can be used, for example, in motor-controlled sliding doors or door openers, which act only on the trap.
  • Disadvantage of this variant is the higher power consumption in the fitting, which is caused by the continuous transmission of Indentmedienetzwecksignals.
  • the "man-in-the-middle" attack can only be avoided by appropriate radiation and range characteristics of the media wake-up signal.
  • a calibration is provided to ensure the signal strength of the media wake-up signal.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lock And Its Accessories (AREA)
  • Selective Calling Equipment (AREA)
EP12450042.2A 2011-10-18 2012-10-16 Procédé de contrôle d'accès Withdrawn EP2584540A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ATA1524/2011A AT512076A1 (de) 2011-10-18 2011-10-18 Verfahren zur zutrittskontrolle

Publications (2)

Publication Number Publication Date
EP2584540A2 true EP2584540A2 (fr) 2013-04-24
EP2584540A3 EP2584540A3 (fr) 2017-01-18

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EP12450042.2A Withdrawn EP2584540A3 (fr) 2011-10-18 2012-10-16 Procédé de contrôle d'accès

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AT (1) AT512076A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2871616A1 (fr) 2013-11-07 2015-05-13 Evva Sicherheitstechnologie GmbH Procédé et dispositif de contrôle d'accès
WO2020165269A1 (fr) * 2019-02-15 2020-08-20 Assa Abloy Ab Circuit de balise destiné à être utilisé avec des verrous électroniques

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