WO1999016989A1 - Procede d'affectation d'une telecommande a une station de base - Google Patents

Procede d'affectation d'une telecommande a une station de base Download PDF

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Publication number
WO1999016989A1
WO1999016989A1 PCT/DE1998/002808 DE9802808W WO9916989A1 WO 1999016989 A1 WO1999016989 A1 WO 1999016989A1 DE 9802808 W DE9802808 W DE 9802808W WO 9916989 A1 WO9916989 A1 WO 9916989A1
Authority
WO
WIPO (PCT)
Prior art keywords
base station
signal
remote control
signals
search
Prior art date
Application number
PCT/DE1998/002808
Other languages
German (de)
English (en)
Inventor
Stefan Schmitz
Original Assignee
Robert Bosch 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
Priority claimed from DE19841514A external-priority patent/DE19841514A1/de
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to DE59811205T priority Critical patent/DE59811205D1/de
Priority to EP98958152A priority patent/EP1017916B1/fr
Priority to AU14325/99A priority patent/AU730422B2/en
Publication of WO1999016989A1 publication Critical patent/WO1999016989A1/fr

Links

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
    • G07C9/20—Individual registration on entry or exit involving the use of a pass
    • G07C9/28—Individual registration on entry or exit involving the use of a pass the pass enabling tracking or indicating presence
    • 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
    • G07C9/20—Individual registration on entry or exit involving the use of a pass
    • G07C9/21—Individual registration on entry or exit involving the use of a pass having a variable access code

Definitions

  • the invention is based on a method according to the type of the main claim, as described in German patent application AZ: 196 45 769.6.
  • a remote control is then assigned to a base station arranged in a motor vehicle by the latter issuing a search signal, to which remote controls located in the range of the search signal respond by returning a contact signal at times which are characteristic of the remote controls.
  • the base station determines the remote controls that are used by evaluating the time of receipt of the contact signal feedback. She selects one of them and carries out a "challenge-response" verification with it. Because clear remote control detection is already possible by exchanging only one signal, and the signal, since it is not safety-relevant, can be simply constructed the entire recognition process is very fast.
  • the subsequent challenge-response verification is therefore decisive for the assignment speed. It is based on the execution of security-relevant arithmetic operations that are extensive and require time.
  • ASIC user-specific integrated circuits
  • the assignment check can thus be triggered by actuating the door handle of a vehicle, so that the door can only be opened if the remote control has been verified as belonging to the vehicle. The user does not notice the mapping process.
  • the aforementioned ASICs perform their function well, but are comparatively expensive to manufacture.
  • the problem is solved by a method with the features of the main claim.
  • the method according to the invention can easily be implemented as a program in the microprocessor already present in the base station or remote control, and makes the provision of an ASIC superfluous. It guarantees the same security as when using an ASIC.
  • a gain in security can advantageously be realized by specifically controlling the speed of the challenge-response calculation if the challenge-response dialog is carried out several times directly in succession.
  • FIG. 1 shows a block diagram of an access device
  • FIG. 2 shows a flow diagram to illustrate its operation.
  • FIG. 1 shows a base station 10, which can be part of a device or object or is permanently assigned to one.
  • the base station can be part of the access control device of a building or a motor vehicle.
  • Another component of the access device shown in FIG. 1 is an actuating device 20, referred to below as remote control, which is functionally assigned to the base station in a contactless manner via a signal transmission path 30.
  • the remote control can in particular be a transponder.
  • the base station 10 acts on the technical device, the part of which or which it is assigned, via active connections (not shown). When used in a motor vehicle, for example, it controls access to the vehicle or its commissioning.
  • a microprocessor 13 which controls the operation of the base station 10, for this purpose, in particular, initiates the output of signals and evaluates incoming signals.
  • a transmitting / receiving device 11 Connected to the microprocessor is a transmitting / receiving device 11 for delivering or receiving signals transmitted in a contactless manner via the signal transmission path 30.
  • a memory 14 is also assigned to the microprocessor 13. This contains assignment information on the basis of which the base station 10 assigned remote controls 20 recognizes. The assignment information is: a serial number 15, a manufacturer code 17, a cryptic key code 31, a directory 16 with information about the remote controls 20 assigned to the base station 10, and a random number 18.
  • the serial number 15 is characteristic of base stations 10 and remote controls assigned to one another 20.
  • the base station 10 or the remote controls 20 It is determined by the manufacturer of the technical device to which the base station 10 or the remote controls 20 are assigned. When used in motor vehicles, for example, the determination can be made by the vehicle manufacturer.
  • the manufacturer code 17 uniquely designates the associated device, ie the base station 10. It is assigned by the base station manufacturer and cannot be changed.
  • the directory 16 contains for each assigned remote control 20 a data record 16a, 16b, 16c which in each case contains the group number 25 of a remote control 20, its manufacturer code 27, a random number and a target response.
  • the group numbers 25 differentiate the remote controls assigned to a base station 10 with the same serial numbers, the associated manufacturer code 27, in conjunction with the cryptic key code 31 and the random number 18, which is generated by the microprocessor 13, used to form the target response.
  • the cryptic key code 31 is preferably also determined by the manufacturer of the associated technical device, for example a vehicle manufacturer.
  • An entire data record 16a, 16b, 16c allows the verification of an associated remote control 20.
  • the remote control has a transmitting / receiving device 21 corresponding to the transmitting / receiving device 11 on the base station, for receiving signals emitted by the base station 10 or for emitting signals to the base station 10.
  • the transmitting / receiving device 21 is analogous to the base station followed by a microprocessor 23 which controls the operation of the remote control 20, in particular the evaluation of the
  • Receiving device 22 performs incoming signals, initiates follow-up measures depending on the results and monitors the output of output signals.
  • a memory unit 24 is assigned to the microprocessor 23, in which assignment information for assigning the remote control 20 to a base station 10 is stored. For this purpose, a serial number 15, a group number 25, a manufacturer code 27 and a cryptic code are stored - analogous to base station 10
  • the meaning of the memory contents corresponds in each case to the meaning of the similar memory contents in the memory 14 of the base station 10.
  • the manufacturer code is assigned by the manufacturer of the remote control 20 and uniquely identifies it.
  • the serial number 15 is a code characteristic of the overall device consisting of the base station 10 and associated remote controls 20 and is identical to the serial number contained in the memory 14 of the base station 10.
  • the group number 25 distinguishes the remote controls 20 which have the same serial number 15 from one another. It is determined by the user when using the overall device.
  • the cryptic key code 31 is determined by the manufacturer of the technical device belonging to the base station 10 and is identical to that present in the base station. In conjunction with the manufacturer code 27 and the challenge signal supplied by the base station 10 via the signal transmission path 30, it is used to verify membership of a base station 10.
  • a plurality of remote controls 20 can be assigned to a base station 10. All remote controls 20 and base station 10 have an identical serial number 15 in their memories 14, 24 and use a cryptic key code 31 for verification. The individual remote controls 20 differ by their group numbers 25 and their manufacturer codes 27.
  • the assignment process is triggered by the actuation of a mechanical, electrical or electro-optical trigger mechanism (not shown) by a user, step 100.
  • the trigger mechanism can consist in particular in actuating the door handle.
  • the microprocessor 13 of the base station 10 On the basis of a signal emitted when the trigger is triggered, the microprocessor 13 of the base station 10 first sets an internal counter A to the value 0, step 102. Then it loads the random number 18 from the memory 14, which then forms the activation signal referred to below as the "challenge” signal , and the expected response signals 16a, 16b, 16c referred to below as “target response” signals for all remote controls 20 assigned to base station 10, step 104. Thereupon, it increments counter A by 1 step 106. Subsequently, the microprocessor 13 initiates the transmission of a search signal by the transmitting / receiving device 11, step 108.
  • the search signal contains, in addition to start and synchronization information, in particular the serial number 15 stored in the memory 14. It is expediently not encrypted and is used by everyone within the remote controls 20 located within the range of the signal transmission path 30 via their transmitting / receiving devices 21.
  • your microprocessors 23 Upon receipt of a search signal, your microprocessors 23 check whether the serial number 15 transmitted with the search signal matches the serial number stored in the memory 24 of the remote control 20 and serving as a reference signal. If there is a mismatch, the remote control 20 no longer takes part in the further membership check. If the signals compared with one another match, the microprocessor 23 initiates a response in the form of a contact signal, step 112.
  • a short, simply constructed signal serves as the contact signal, for example the group number 25 of the respective remote control 20 in bit-coded form.
  • the contact signal like the search signal, is expediently unencrypted.
  • the microprocessor 24 initiates the transmission of the contact signal after a period of time, which is characteristic of the remote control 20 and is determined by the group number 25, from the receipt of the search signal. It then takes place in a time window with a predetermined length.
  • the transmission is dimensioned such that a reliable assignment of the contact signal to the time window is possible for both the remote control 20 and for the base station 10.
  • the microprocessor 13 of the base station 10 By checking in which time windows contact signals are received, the microprocessor 13 of the base station 10 now determines which remote controls 20 are present with which group numbers, step 114. If no remote control 20 is found, the microprocessor 13 checks the Value of counter A, step 116. If it is smaller than a predetermined reference value, for example 5, it immediately causes a search signal to be transmitted again and the process is repeated from step 106 onwards. If the reference value is exceeded, the microprocessor 13 aborts the membership check, step 117. If the check in step 114 reveals that at least one remote control 20 is present, the microprocessor 13 selects one from the remote controls 20 with which it subsequently uses one Carries out a membership check, step 118. After selecting a remote control, it counts a second internal counter B up one step, step 120. The microprocessor 13 then causes a subsequent challenge signal to be transmitted via the transceiver 11. The random number 18 stored in the memory 14 serves as the challenge signal.
  • a predetermined reference value
  • the selected remote control 20 receives the challenge signal via its transmitting / receiving device 21 and, by linking it with the manufacturer code 27 and the cryptic key code 31, forms a “response” signal which it sends back to the base station 10 as a response signal, step 124.
  • the microprocessor 13 After receipt, the microprocessor 13 compares the response signal sent back from the remote control 20 with the target response signal 16a, 16, 16c of the selected remote control 20 previously loaded in step 104, step 126. The target response signal and the response signal are correct coincides, the microprocessor 13 resets the internal counter B to the value 0, step 132 and causes the output of an enable signal which, for example, enables access to and / or operation of a motor vehicle, step 134. The microprocessor 13 then determines a random number 18 and thus determines for everyone entered in directory 16 gene group number 25 a new target response signal, step 136. With the random number 18 and the newly formed target response signals, it then occupies the memory locations 16a, 16b, 16c and 18 anew. The new memory contents serve as the basis for the assignment check after the next renewed triggering process. When the memory contents 16 and 18 are rewritten, the membership test process is ended, step 138.
  • step 126 If the check in step 126 shows that the response signal sent back by the remote control 20 does not match the target response signal 16a, 16b, 16c loaded by the processor, the microprocessor 13 increments the internal counter B by one step, step 128 Then he checks whether the content of the counter B exceeds a predetermined limit value, for example the value 3, step 130. If this is the case, the microprocessor 13 determines a new random number 18 and new target response signals in accordance with step 136 16a, 16b, 16c with which it overwrites the corresponding memory contents in the memory 14. Thereafter, it cancels the mapping check process, step 138.
  • a predetermined limit value for example the value 3, step 130.
  • step 130 If the check in step 130 shows that the limit value assigned to counter B has not yet been exceeded, the microprocessor 13 likewise redetermines the random number 18 and the target response signals 16a, 16b, 16c in accordance with step 136. Subsequently, however, it continues with the repetition of step 104 and immediately reloads the newly determined memory contents 18 and 16a, 16b, 16c in order to subsequently carry out step 106.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Selective Calling Equipment (AREA)
  • Lock And Its Accessories (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé d'affectation d'une télécommande à une station de base. La station de base (10) émet un signal de recherche (108) auquel la télécommande (20) répond en envoyant (112) un signal de contact, en cas de correspondance du signal de recherche avec un signal de référence mémorisé. Après entrée de ce signal de contact, la station de base (10) envoie (122) un signal d'activation, qui varie pour chaque affectation, pour vérifier l'appartenance à la télécommande (20). Le signal d'activation modifiable est un signal qui a déjà été fixé (136) et mémorisé avant l'émission du signal de recherche par la station de base, et il n'est extrait (104) que pour l'affectation.
PCT/DE1998/002808 1997-09-26 1998-09-22 Procede d'affectation d'une telecommande a une station de base WO1999016989A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE59811205T DE59811205D1 (de) 1997-09-26 1998-09-22 Verfahren zum zuordnen einer fernbedienung zu einer basisstation
EP98958152A EP1017916B1 (fr) 1997-09-26 1998-09-22 Procede d'affectation d'une telecommande a une station de base
AU14325/99A AU730422B2 (en) 1997-09-26 1998-09-22 Method for allocating a remote control to a base station

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19742495.3 1997-09-26
DE19742495 1997-09-26
DE19841514A DE19841514A1 (de) 1997-09-26 1998-09-10 Verfahren zum Zuordnen einer Fernbedienung zu einer Basisstation
DE19841514.1 1998-09-10

Publications (1)

Publication Number Publication Date
WO1999016989A1 true WO1999016989A1 (fr) 1999-04-08

Family

ID=26040328

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1998/002808 WO1999016989A1 (fr) 1997-09-26 1998-09-22 Procede d'affectation d'une telecommande a une station de base

Country Status (4)

Country Link
EP (1) EP1017916B1 (fr)
AU (1) AU730422B2 (fr)
ES (1) ES2219920T3 (fr)
WO (1) WO1999016989A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6475724B1 (en) 1997-01-28 2002-11-05 The Regents Of The University Of California Nucleic acids, kits, and methods for the diagnosis, prognosis and treatment of glaucoma and related disorders

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0029560A1 (fr) * 1979-11-21 1981-06-03 BROWN, BOVERI & CIE Aktiengesellschaft Mannheim Procédé pour détecter et compter des objets
EP0285419A2 (fr) * 1987-03-31 1988-10-05 Identec Limited Equipement de contrôle d'accès
US5266925A (en) * 1991-09-30 1993-11-30 Westinghouse Electric Corp. Electronic identification tag interrogation method
WO1997034222A1 (fr) * 1996-03-12 1997-09-18 Single Chip Systems Corporation Procede et appareil destines aux etiquettes d'identification a radiofrequences

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0029560A1 (fr) * 1979-11-21 1981-06-03 BROWN, BOVERI & CIE Aktiengesellschaft Mannheim Procédé pour détecter et compter des objets
EP0285419A2 (fr) * 1987-03-31 1988-10-05 Identec Limited Equipement de contrôle d'accès
US5266925A (en) * 1991-09-30 1993-11-30 Westinghouse Electric Corp. Electronic identification tag interrogation method
WO1997034222A1 (fr) * 1996-03-12 1997-09-18 Single Chip Systems Corporation Procede et appareil destines aux etiquettes d'identification a radiofrequences

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6475724B1 (en) 1997-01-28 2002-11-05 The Regents Of The University Of California Nucleic acids, kits, and methods for the diagnosis, prognosis and treatment of glaucoma and related disorders

Also Published As

Publication number Publication date
EP1017916A1 (fr) 2000-07-12
AU1432599A (en) 1999-04-23
ES2219920T3 (es) 2004-12-01
AU730422B2 (en) 2001-03-08
EP1017916B1 (fr) 2004-04-14

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