EP0103790A2 - Procédé de codage pour une clé électronique - Google Patents

Procédé de codage pour une clé électronique Download PDF

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Publication number
EP0103790A2
EP0103790A2 EP83108588A EP83108588A EP0103790A2 EP 0103790 A2 EP0103790 A2 EP 0103790A2 EP 83108588 A EP83108588 A EP 83108588A EP 83108588 A EP83108588 A EP 83108588A EP 0103790 A2 EP0103790 A2 EP 0103790A2
Authority
EP
European Patent Office
Prior art keywords
transmitter
receiver
code
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Withdrawn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
EP83108588A
Other languages
German (de)
English (en)
Other versions
EP0103790A3 (fr
Inventor
Heinz Dipl.-Phys. Preissinger
Kurt Dipl.-Ing. Schwaiger
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP0103790A2 publication Critical patent/EP0103790A2/fr
Publication of EP0103790A3 publication Critical patent/EP0103790A3/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Withdrawn legal-status Critical Current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
    • G07C9/00182—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional 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
    • G07C9/20—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
    • 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
    • G07C9/00182—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional data transmission between data carrier and locks
    • G07C2009/00238—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional data transmission between data carrier and locks the transmittted data signal containing a code which is changed
    • G07C2009/00253—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional data transmission between data carrier and locks the transmittted data signal containing a code which is changed dynamically, e.g. variable code - rolling code
    • 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
    • G07C2009/00785—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 light
    • 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
    • G07C2209/06—Involving synchronization or resynchronization between transmitter and receiver; reordering of codes

Definitions

  • the invention relates to a method for code security in an electronic key, in particular for motor vehicles with a built-in central locking system, which consists of a transmitter which emits a coded infrared signal which is received by a receiver tuned to the code, the code of Signal at the transmitter and receiver is adjustable.
  • the described copying option could only be prevented if the transmitter and receiver were brought so close together that a second receiver was not in the beam area of the transmitter.
  • this is difficult to achieve on the one hand in motor vehicles, since the receiver is arranged inside the vehicle, so that reflections, for example on the windows, can practically not be avoided, and on the other hand it contradicts also the convenient handling of such electronic locks.
  • An electronic key of the type mentioned is known from DE-A-29 06 665.
  • the known electronic key it is possible to adjust the code of the signal at the transmitter and at the receiver by means of switches. In this way, there is basically the possibility of changing the code, which can make unauthorized use of the vehicle more difficult.
  • the code on the transmitter and receiver will be set differently, so that the vehicle can no longer be unlocked.
  • the object of the invention is to provide a '.A process for code - to provide assurance for an electronic key of the type mentioned, is prevented by the secure manner in an unauthorized use of Kraftfährzeugen by copying the transmission-side signal.
  • This object is achieved in the method mentioned at the outset in that a number of code numbers 1 to n are stored in the transmitter and in the receiver and that a new matching code number is set automatically in the transmitter and receiver after each transmission and reception process .
  • code 0 is thus sent, for example, during the first unlocking attempt, the receiver also being matched to this code 0 is and the lock opens.
  • code 1 is sent, for example, to which the recipient is also sensitized and opens. This process continues until after the nth opening the coding sequence starts again with code 0.
  • the advantage of the method according to the invention is that the copying described above is possible in principle, but that the copied code is no longer valid on the next attempt, since the recipient is sensitized to the next code in the cyclical sequence.
  • the number and sequence of such a cycle can be freely selected and are only valid for a transmitter / receiver combination (key / lock combination).
  • One embodiment of the method according to the invention provides that the transmitter and receiver are electronically connected to one another after a unlocking process has been carried out and the respectively valid transmitter code is transmitted to the receiver. This is possible, for example, by connecting the transmitter and receiver using a plug connection while driving.
  • the transmitter sends a reset code when the device is initialized, so that the transmitter and receiver are synchronized to the same code. This ensures in each case that the sender and receiver are each matched to the same code number, i.e. run synchronously. Urinitialization is required, for example, if the power supply fails and batteries are replaced. Before the transmitter sends code 0, the transmitter starts with a reset code, which also causes the receiver to start with code 0.
  • a further development of the invention is that the receiver transmits an acknowledgment signal to the transmitter for switching to the next code after each unlocking.
  • This so-called "hand-shaking method" can advantageously be used to ensure synchronization during operation.
  • this requires a receiver on the transmitter side and a transmitter on the receiver side. For example, if the code is sent in groups of 3 x 8 bits, an acknowledgment signal can be sent after the first group. If this does not arrive, the further transmission of the code is stopped. Time criteria are possible for additional security.
  • FIG. 1 shows the block diagram of an electronic key, which consists of a transmitter 1 and a receiver 2.
  • the transmitter 1 controls, for example via the amplifier 3, a photodiode 4, which emits an infrared signal 5, which is picked up by a phototransistor 6.
  • the signal at the phototransistor 6 is fed via the amplifier 7 to the receiver 2, at the output 8 of which a signal 9 appears by which the central locking of the motor vehicle is controlled.
  • transmitter 1 and receiver 2 each consist of a CMOS microprocessor with subsequent amplifiers 3 and 7 and infrared transmitter diode 4 and infrared photo transistor 6.
  • a receiving diode can also be connected.
  • FIG. 2 shows an exemplary embodiment of an electronic key that works with an acknowledgment process (hand-shaking process).
  • the transmitter 10 controls via the amplifier 12 a photodiode 11 which emits the coded infrared signal 14 that is fed from the phototransistor 15 via the amplifier 16 to the receiver 11.
  • the signal 18 is present for controlling the central locking.
  • the receiver 11 has the possibility, via the amplifier 19, of driving the photodiode 20 which, after successful unlocking, transmits the signal 21 to the phototransistor 22, which feeds the acknowledgment signal to the transmitter 10 via the amplifier 23.
  • the method according to the invention allows an electronic key for motor vehicles to be designed to be theft-proof in a simple manner.
  • the transmitter can for example be of the order of a matchbox so that it can be carried easily.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Lock And Its Accessories (AREA)
EP83108588A 1982-09-17 1983-08-31 Procédé de codage pour une clé électronique Withdrawn EP0103790A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823234538 DE3234538A1 (de) 1982-09-17 1982-09-17 Verfahren zur code-sicherung bei einem elektronischen schluessel
DE3234538 1982-09-17

Publications (2)

Publication Number Publication Date
EP0103790A2 true EP0103790A2 (fr) 1984-03-28
EP0103790A3 EP0103790A3 (fr) 1984-09-05

Family

ID=6173509

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83108588A Withdrawn EP0103790A3 (fr) 1982-09-17 1983-08-31 Procédé de codage pour une clé électronique

Country Status (2)

Country Link
EP (1) EP0103790A3 (fr)
DE (1) DE3234538A1 (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2536781A1 (fr) * 1982-11-27 1984-06-01 Kiekert Gmbh Co Kg Installation de verrouillage central pour un vehicule automobile
EP0307749A1 (fr) * 1987-09-14 1989-03-22 Siemens Aktiengesellschaft Méthode pour la transmission optique de données entre deux dispositifs d'émission et de réception à séparation galvanique
EP0813170A2 (fr) * 1996-06-03 1997-12-17 Werner Dipl.-Ing. Eckel Système électronique d'autorisation d'accès et procédé pour détecter l'accès autorisé
US6175312B1 (en) 1990-05-29 2001-01-16 Microchip Technology Incorporated Encoder and decoder microchips and remote control devices for secure unidirectional communication
WO2005018103A1 (fr) * 2003-08-13 2005-02-24 Philips Intellectual Property & Standards Gmbh Procede et dispositif de chiffrement d'un flux de donnees numeriques dans un systeme de transmission
US6980655B2 (en) 2000-01-21 2005-12-27 The Chamberlain Group, Inc. Rolling code security system
US10652743B2 (en) 2017-12-21 2020-05-12 The Chamberlain Group, Inc. Security system for a moveable barrier operator
US10862924B2 (en) 2005-06-30 2020-12-08 The Chamberlain Group, Inc. Method and apparatus to facilitate message transmission and reception using different transmission characteristics
US10944559B2 (en) 2005-01-27 2021-03-09 The Chamberlain Group, Inc. Transmission of data including conversion of ternary data to binary data
US10997810B2 (en) 2019-05-16 2021-05-04 The Chamberlain Group, Inc. In-vehicle transmitter training
US11074773B1 (en) 2018-06-27 2021-07-27 The Chamberlain Group, Inc. Network-based control of movable barrier operators for autonomous vehicles
US11423717B2 (en) 2018-08-01 2022-08-23 The Chamberlain Group Llc Movable barrier operator and transmitter pairing over a network

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3636822C2 (de) * 1986-10-29 1993-12-23 Ruf Kg Wilhelm Elektronische Fernbetätigungseinrichtung, insbesondere für Zentralverriegelungsanlagen von Kraftfahrzeugen
US6166650A (en) * 1991-05-29 2000-12-26 Microchip Technology, Inc. Secure self learning system
US6690796B1 (en) 1995-05-17 2004-02-10 The Chamberlain Group, Inc. Rolling code security system
BR9606663A (pt) 1995-05-17 1997-09-16 Chamberlain Group Inc Transmissor para enviar um sinal criptografado para controlar um atuador receptor para receber um sinal criptografado de um transmissor e para gerar um sinal de atuação e receptor para receber um sinal de frequência de rádio criptografado de um transmissor e para gerar um sinal de atuação
US6108326A (en) * 1997-05-08 2000-08-22 Microchip Technology Incorporated Microchips and remote control devices comprising same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2922230A1 (de) * 1979-04-10 1980-10-23 Martin H Gygi Sendender informationstraeger und empfaengervorrichtung
GB1582989A (en) * 1977-11-23 1981-01-21 Motorola Inc Security systems
GB1595797A (en) * 1978-04-21 1981-08-19 Pushman Hugh John Security systems
WO1982002811A1 (fr) * 1981-02-06 1982-08-19 Avi N Nelson Systeme de securite

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1582989A (en) * 1977-11-23 1981-01-21 Motorola Inc Security systems
GB1595797A (en) * 1978-04-21 1981-08-19 Pushman Hugh John Security systems
DE2922230A1 (de) * 1979-04-10 1980-10-23 Martin H Gygi Sendender informationstraeger und empfaengervorrichtung
WO1982002811A1 (fr) * 1981-02-06 1982-08-19 Avi N Nelson Systeme de securite

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IBM TECHNICAL DISCLOSURE BULLETIN, Band 14, Nr. 12, Mai 1972, Seiten 3860-3861, Armonk, New York 10504, US G.V.A. MALMROS: "Access control system" *

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2536781A1 (fr) * 1982-11-27 1984-06-01 Kiekert Gmbh Co Kg Installation de verrouillage central pour un vehicule automobile
EP0307749A1 (fr) * 1987-09-14 1989-03-22 Siemens Aktiengesellschaft Méthode pour la transmission optique de données entre deux dispositifs d'émission et de réception à séparation galvanique
US6175312B1 (en) 1990-05-29 2001-01-16 Microchip Technology Incorporated Encoder and decoder microchips and remote control devices for secure unidirectional communication
EP0813170A2 (fr) * 1996-06-03 1997-12-17 Werner Dipl.-Ing. Eckel Système électronique d'autorisation d'accès et procédé pour détecter l'accès autorisé
EP0813170A3 (fr) * 1996-06-03 1999-04-28 Werner Dipl.-Ing. Eckel Système électronique d'autorisation d'accès et procédé pour détecter l'accès autorisé
US6980655B2 (en) 2000-01-21 2005-12-27 The Chamberlain Group, Inc. Rolling code security system
WO2005018103A1 (fr) * 2003-08-13 2005-02-24 Philips Intellectual Property & Standards Gmbh Procede et dispositif de chiffrement d'un flux de donnees numeriques dans un systeme de transmission
US10944559B2 (en) 2005-01-27 2021-03-09 The Chamberlain Group, Inc. Transmission of data including conversion of ternary data to binary data
US11799648B2 (en) 2005-01-27 2023-10-24 The Chamberlain Group Llc Method and apparatus to facilitate transmission of an encrypted rolling code
US10862924B2 (en) 2005-06-30 2020-12-08 The Chamberlain Group, Inc. Method and apparatus to facilitate message transmission and reception using different transmission characteristics
US10652743B2 (en) 2017-12-21 2020-05-12 The Chamberlain Group, Inc. Security system for a moveable barrier operator
US12108248B2 (en) 2017-12-21 2024-10-01 The Chamberlain Group Llc Security system for a moveable barrier operator
US11122430B2 (en) 2017-12-21 2021-09-14 The Chamberlain Group, Inc. Security system for a moveable barrier operator
US11778464B2 (en) 2017-12-21 2023-10-03 The Chamberlain Group Llc Security system for a moveable barrier operator
US11763616B1 (en) 2018-06-27 2023-09-19 The Chamberlain Group Llc Network-based control of movable barrier operators for autonomous vehicles
US11074773B1 (en) 2018-06-27 2021-07-27 The Chamberlain Group, Inc. Network-based control of movable barrier operators for autonomous vehicles
US12056971B1 (en) 2018-06-27 2024-08-06 The Chamberlain Group Llc. Network-based control of movable barrier operators for autonomous vehicles
US11423717B2 (en) 2018-08-01 2022-08-23 The Chamberlain Group Llc Movable barrier operator and transmitter pairing over a network
US11869289B2 (en) 2018-08-01 2024-01-09 The Chamberlain Group Llc Movable barrier operator and transmitter pairing over a network
US11462067B2 (en) 2019-05-16 2022-10-04 The Chamberlain Group Llc In-vehicle transmitter training
US10997810B2 (en) 2019-05-16 2021-05-04 The Chamberlain Group, Inc. In-vehicle transmitter training

Also Published As

Publication number Publication date
EP0103790A3 (fr) 1984-09-05
DE3234538A1 (de) 1984-03-22

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Inventor name: SCHWAIGER, KURT, DIPL.-ING.

Inventor name: PREISSINGER, HEINZ, DIPL.-PHYS.