EP0128457A2 - Procédé de codage pour une clé électronique - Google Patents

Procédé de codage pour une clé électronique Download PDF

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Publication number
EP0128457A2
EP0128457A2 EP84106142A EP84106142A EP0128457A2 EP 0128457 A2 EP0128457 A2 EP 0128457A2 EP 84106142 A EP84106142 A EP 84106142A EP 84106142 A EP84106142 A EP 84106142A EP 0128457 A2 EP0128457 A2 EP 0128457A2
Authority
EP
European Patent Office
Prior art keywords
code
receiver
transmitter
electronic key
stored
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Withdrawn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
EP84106142A
Other languages
German (de)
English (en)
Other versions
EP0128457A3 (fr
Inventor
Friedrich Dr. Dannhäuser
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
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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, Siemens Corp filed Critical Siemens AG
Publication of EP0128457A2 publication Critical patent/EP0128457A2/fr
Publication of EP0128457A3 publication Critical patent/EP0128457A3/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Withdrawn legal-status Critical Current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
    • G07C9/00182—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

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 matched to the code, the code of Signals at the transmitter and receiver can be adjusted in that a number of code numbers 1 to n are stored in the transmitter and in the receiver and a new matching code number is automatically set in the transmitter and receiver after each transmission and reception process.
  • the transmitter and receiver are different Codes set because the code number in the transmitter is switched after each transmission, but the receiver, because it has not received a signal, has remained on the code number corresponding to the signal last received. So it happens that the motor vehicle can no longer be unlocked.
  • the code sent by the transmitter contains information for the receiver as to which code number is to be selected next from the stored stock.
  • An advantageous embodiment of the method according to the invention consists in the fact that the receiver accepts resynchronization only in the direction of higher code numbers. It is also advantageous if the receiver only accepts resynchronization in a narrow interval of code numbers.
  • the security risk is significantly restricted by the further development according to the invention, since the sequence formed from the two codes could lead to the lock being opened if unauthorized repetition occurs. Because the receiver only accepts resynchronization to higher numbers in its code list or only in a narrow interval of code numbers, a code sequence that has been listened to is immediately ineffective and can only be used after a long period of time unknown to the unauthorized user become effective.
  • a 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 infrared signal 5 is coded and additionally contains information for the receiver 2 which code number is to be selected next from the stored stock.
  • 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.
  • n 11 there are approx. 40 million possible combinations. These possible combinations are selected in a suitable manner and stored in the transmitter 1 and receiver 2, so that it is ensured during manufacture that a vehicle works with only one code set, that is to say that there is only one key for one vehicle.
  • the method according to the invention makes it possible in a simple manner to design an electronic key for motor vehicles that is secure against theft, a synchronization between the transmitter and receiver being set if asynchronousness between transmitter and receiver initially exists due to accidentally triggered transmission signals.
  • 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)
  • Selective Calling Equipment (AREA)
EP84106142A 1983-06-08 1984-05-29 Procédé de codage pour une clé électronique Withdrawn EP0128457A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3320721 1983-06-08
DE19833320721 DE3320721A1 (de) 1983-06-08 1983-06-08 Verfahren zur code-sicherung bei einem elektronischen schluessel

Publications (2)

Publication Number Publication Date
EP0128457A2 true EP0128457A2 (fr) 1984-12-19
EP0128457A3 EP0128457A3 (fr) 1987-07-22

Family

ID=6200962

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84106142A Withdrawn EP0128457A3 (fr) 1983-06-08 1984-05-29 Procédé de codage pour une clé électronique

Country Status (3)

Country Link
EP (1) EP0128457A3 (fr)
JP (1) JPS6010081A (fr)
DE (1) DE3320721A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0219060A3 (en) * 1985-10-11 1988-08-24 Bayerische Motoren Werke Aktiengesellschaft Security device for an automotive vehicle

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3520397A1 (de) * 1985-06-07 1986-12-11 Audi AG, 8070 Ingolstadt Verfahren zur kodierung
DE3624707A1 (de) * 1985-07-22 1987-01-22 Aisin Seiki Schlosssteuereinrichtung fuer fahrzeuge
DE3636822C2 (de) * 1986-10-29 1993-12-23 Ruf Kg Wilhelm Elektronische Fernbetätigungseinrichtung, insbesondere für Zentralverriegelungsanlagen von Kraftfahrzeugen
FR2616252A1 (fr) * 1987-06-04 1988-12-09 Lot Gerard Procede et installation de surveillance de deplacements dans une zone protegee
US4854143A (en) * 1987-08-07 1989-08-08 Intelock Corporation Bolt assembly and method
DE3840857A1 (de) * 1988-12-03 1990-06-07 Hella Kg Hueck & Co Einrichtung zur fernsteuerung von sicherungseinrichtungen
US6166650A (en) * 1991-05-29 2000-12-26 Microchip Technology, Inc. Secure self learning system
DE4221142C2 (de) * 1992-06-27 1998-02-19 Kiekert Ag Zentralverriegelungsanlage für ein Kraftfahrzeug
JP3319230B2 (ja) * 1994-08-05 2002-08-26 株式会社デンソー 遠隔操作装置
US6690796B1 (en) 1995-05-17 2004-02-10 The Chamberlain Group, Inc. Rolling code security system
US6980655B2 (en) 2000-01-21 2005-12-27 The Chamberlain Group, Inc. Rolling code security system
AU710682B2 (en) 1995-05-17 1999-09-30 Chamberlain Group, Inc., The Rolling code security system
US6108326A (en) * 1997-05-08 2000-08-22 Microchip Technology Incorporated Microchips and remote control devices comprising same
US8422667B2 (en) 2005-01-27 2013-04-16 The Chamberlain Group, Inc. Method and apparatus to facilitate transmission of an encrypted rolling code
US9148409B2 (en) 2005-06-30 2015-09-29 The Chamberlain Group, Inc. Method and apparatus to facilitate message transmission and reception using different transmission characteristics
US12556387B2 (en) 2005-01-27 2026-02-17 The Chamberlain Group Llc Method and apparatus to facilitate transmission of an encrypted rolling code
CN110582408B (zh) * 2017-09-26 2021-06-04 佐藤控股株式会社 打印机
US10652743B2 (en) 2017-12-21 2020-05-12 The Chamberlain Group, Inc. Security system for a moveable barrier operator
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
US10997810B2 (en) 2019-05-16 2021-05-04 The Chamberlain Group, Inc. In-vehicle transmitter training

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1595797A (en) * 1978-04-21 1981-08-19 Pushman Hugh John Security systems
DE3237622A1 (de) * 1982-10-11 1984-04-12 Bayerische Motoren Werke AG, 8000 München Sicherheitseinrichtung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0219060A3 (en) * 1985-10-11 1988-08-24 Bayerische Motoren Werke Aktiengesellschaft Security device for an automotive vehicle

Also Published As

Publication number Publication date
DE3320721A1 (de) 1984-12-13
JPS6010081A (ja) 1985-01-19
EP0128457A3 (fr) 1987-07-22

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Inventor name: DANNHAEUSER, FRIEDRICH, DR.