EP0103791A2 - Procédé de codage pour une clé électronique - Google Patents

Procédé de codage pour une clé électronique Download PDF

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Publication number
EP0103791A2
EP0103791A2 EP83108591A EP83108591A EP0103791A2 EP 0103791 A2 EP0103791 A2 EP 0103791A2 EP 83108591 A EP83108591 A EP 83108591A EP 83108591 A EP83108591 A EP 83108591A EP 0103791 A2 EP0103791 A2 EP 0103791A2
Authority
EP
European Patent Office
Prior art keywords
receiver
transmitter
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Withdrawn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
EP83108591A
Other languages
German (de)
English (en)
Other versions
EP0103791A3 (fr
Inventor
Horst Dipl.-Astr. Hagedorn
Erwin Dipl.-Ing. Heuwieser
Heinz Dipl.-Phys. Preissinger
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 EP0103791A2 publication Critical patent/EP0103791A2/fr
Publication of EP0103791A3 publication Critical patent/EP0103791A3/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Withdrawn legal-status Critical Current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
    • 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 copying option described can only be prevented if the transmitter and receiver are brought so close together that a second receiver is not in the beam area of the transmitter. However, this is practically not possible in motor vehicles since the receiver is arranged inside the vehicle while the transmitter is outside the vehicle. Due to reflections, for example on the panes, there is a risk that the emitted signal, even when approaching closely, is scattered and can be illegally picked up by a second recipient.
  • An electronic key of the type mentioned is known from DE-A-29 06 665.
  • the known key has switch groups for adjusting the code on the transmitter and receiver, as a result of which the code can be set by the user.
  • the object of the invention is to provide a method for code security for an electronic key, which ensures in a simple manner that the electronic key cannot be used by unauthorized persons.
  • this object is achieved according to the invention by using a random generator which selects an arbitrary bit pattern from the number of code possibilities and transmits the transmitter and receiver, preferably by means of a forced synchronization.
  • Illegal use of a copied code is practically excluded.
  • the Exchange of information of the valid code by means of a forced synchronization, which is achieved, for example, by electronically connecting the transmitter and receiver. This is done, for example, by plugging the transmitter and receiver together in the vehicle so that other functions, for example switching on the ignition, are guaranteed.
  • a forced synchronization which is achieved, for example, by electronically connecting the transmitter and receiver. This is done, for example, by plugging the transmitter and receiver together in the vehicle so that other functions, for example switching on the ignition, are guaranteed.
  • the transmitter sends a reset code after a battery change, which ensures that the electronic lock can be opened in any case.
  • a further embodiment provides that when the operating voltage of the receiver drops below a certain value by means of a latch circuit e.g. Relay, a bolt is operated, which enables unlocking with a mechanical key.
  • a latch circuit e.g. Relay
  • the reset code can also be started, as when changing the battery in the transmitter, or the next-valid code of the random number generator can be transmitted to the receiver or to the transmitter by means of forced synchronization.
  • Another embodiment of the method according to the invention is that different to one receiver belonging transmitter receive an identifier, and that the code valid for each transmitter is stored in the receiver. This has the advantage that, for example, several keys can be issued for a vehicle and at the same time the advantages of coding with the random number generator are retained for each individual key.
  • the method according to the invention preferably works.
  • the transmitter can either be equipped with an operating button which alternately operates the functions "open” and "closed”.
  • two different buttons can also be arranged on the transmitter for this purpose.
  • the reset code can be sent, for example, by pressing one of the buttons for a long time.
  • Another advantage of the method according to the invention is, for example, that when the vehicle is handed over to the workshop, the lock is opened electronically and can be operated with the mechanical key, so. that the electronic key remains in the user's hand.
  • both the transmitter and the receiver are provided with an automatic switching system which cyclically interchange the code, if by any mistake the forced synchronization has not been performed. This ensures that copying the code is of no use even if, for example, only the vehicle is opened without starting it, so that forced synchronization has not taken place. In this case there would otherwise be the possibility that illegal use could take place by means of a copied signal.
  • the identification of each transmitter from the multitude of transmitter / receiver combinations can be carried out in the manner of a selection switch, which is described, for example, in DE-U-80 05 555.
  • the selection switch can consist of a stamp that cuts through the corresponding coding inputs. In this way, a characteristic image pattern is generated which is read upon initialization in order to have the program start at the key-specific point for the code.
  • the identification code is expediently a reset or "door to" code at the same time. This means that a clear assignment is also possible when reordering keys; when the key is potted, it is electronic by sending the signal, e.g. "Door closed" to determine.
  • transmitter 1 denotes a transmitter and 2 the associated receiver.
  • transmitter 1 and receiver 2 each consist of a CMOS microprocessor with subsequent amplifier 3 or 7 and infrared transmitter diode 4 or phototransistor 6.
  • Transmitter 1 sends out the coded infrared signal 5 via the photodiode 4, which is received by the fctotransistor 6 and via the Amplifier 7 is fed to the receiver 2.
  • a control signal 9 appears, with which the central locking of the motor vehicle is operated.
  • the random generator required for the method according to the invention can be easily implemented with the help of the microprocessors already present and can be accommodated either in the transmitter 1 or in the receiver 2.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Lock And Its Accessories (AREA)
EP83108591A 1982-09-17 1983-08-31 Procédé de codage pour une clé électronique Withdrawn EP0103791A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3234539 1982-09-17
DE19823234539 DE3234539A1 (de) 1982-09-17 1982-09-17 Verfahren zur code-sicherung bei einem elektronischen schluessel

Publications (2)

Publication Number Publication Date
EP0103791A2 true EP0103791A2 (fr) 1984-03-28
EP0103791A3 EP0103791A3 (fr) 1984-09-05

Family

ID=6173510

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83108591A Withdrawn EP0103791A3 (fr) 1982-09-17 1983-08-31 Procédé de codage pour une clé électronique

Country Status (3)

Country Link
EP (1) EP0103791A3 (fr)
JP (1) JPS5965175A (fr)
DE (1) DE3234539A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0257376A1 (fr) * 1986-08-12 1988-03-02 Siemens Aktiengesellschaft Installation de fermeture électronique comportant au moins une serrure, en particulier applicable aux véhicules automobiles
FR2606232A1 (fr) * 1986-10-31 1988-05-06 Neiman Sa Procede de codage evolutif de haute securite et dispositif de mise en oeuvre de ce procede
FR2640104A1 (fr) * 1988-12-03 1990-06-08 Hella Kg Hueck & Co Dispositif de telecommande de moyens de securite tels que verrouillages centralises et securites antivol
GB2226593A (en) * 1988-12-30 1990-07-04 Ivan Anastasovski Digital electronic lock
DE9419635U1 (de) * 1994-12-09 1995-03-02 Engel, Gerhard, Dipl.-Ing., 41564 Kaarst Sicherungseinrichtung insbesondere für Kraftfahrzeuge
DE4440349A1 (de) * 1994-11-11 1996-05-15 Bayerische Motoren Werke Ag Verfahren zum Synchronisieren zweier dialogfähiger Sender-Empfängereinheiten für ein Codesignal in einer Kraftfahrzeug-Schließanlage
DE19533732A1 (de) * 1995-09-12 1997-03-13 Koerling Franz Josef Elektronische Verschlußanlage
FR2738587A1 (fr) * 1995-09-08 1997-03-14 Kiekert Ag Procede de commande d'un dispositif de fermeture pour un vehicule automobile, muni d'un systeme de commande a distance ainsi que d'un transpondeur
USRE37986E1 (en) 1984-05-30 2003-02-11 The Chamberlain Group, Inc. Coding system for multiple transmitters and a single receiver

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3421540A1 (de) * 1984-06-08 1986-01-02 Audi AG, 8070 Ingolstadt Schliesssystem mit einem batteriebetriebenen infrarot-handsender
JPH07961B2 (ja) * 1985-10-16 1995-01-11 カシオ計算機株式会社 電子キ−装置
JPS62101771A (ja) * 1985-10-29 1987-05-12 オムロン株式会社 リモ−トコントロ−ル型キ−操作装置
JPH01244088A (ja) * 1988-03-22 1989-09-28 Kondeishiyonaru Akusesu Technol Kenkyusho:Kk 電子錠
AT395998B (de) * 1991-09-09 1993-04-26 Grundmann Gmbh Geb Anordnung zur energie- und datenuebertragung
DE4411451C1 (de) * 1994-04-01 1995-05-04 Daimler Benz Ag Fahrzeugsicherungseinrichtung mit elektronischer Nutzungsberechtigungscodierung
DE4411450C1 (de) * 1994-04-01 1995-03-30 Daimler Benz Ag Fahrzeugsicherungseinrichtung mit elektronischer Nutzungsberechtigungscodierung
DE4411449C1 (de) * 1994-04-01 1995-03-16 Daimler Benz Ag Fahrzeugsicherungseinrichtung mit elektronischer Nutzungsberechtigungscodierung
US6980655B2 (en) 2000-01-21 2005-12-27 The Chamberlain Group, Inc. Rolling code security system
CA2193846C (fr) 1995-05-17 2004-02-17 Bradford L. Farris Systeme de securite a code de brassage
US6690796B1 (en) 1995-05-17 2004-02-10 The Chamberlain Group, Inc. Rolling code security system
US12149618B2 (en) 2005-01-27 2024-11-19 The Chamberlain Group Llc Method and apparatus to facilitate transmission of an encrypted rolling code
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
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
WO2020028502A1 (fr) 2018-08-01 2020-02-06 The Chamberlain Group, Inc. Opérateur de barrière mobile et appariement d'émetteurs sur un réseau
US10997810B2 (en) 2019-05-16 2021-05-04 The Chamberlain Group, Inc. In-vehicle transmitter training

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3859634A (en) * 1971-04-09 1975-01-07 Little Inc A Digital lock system having electronic key card
US4148092A (en) * 1977-08-04 1979-04-03 Ricky Martin Electronic combination door lock with dead bolt sensing means
FR2420008A1 (fr) * 1978-03-17 1979-10-12 Neiman Sa Dispositif de commande d'une serrure de vehicule automobile
GB1595797A (en) * 1978-04-21 1981-08-19 Pushman Hugh John Security systems
DE2824421C2 (de) * 1978-06-03 1985-10-10 Robert Bosch Gmbh, 7000 Stuttgart Schaltanordnung zum Betreiben von Schließeinrichtungen und ähnlichen Sicherheitseinrichtungen, insbesondere als Diebstahlschutz an einem Kraftfahrzeug
DE3006128A1 (de) * 1980-02-19 1981-08-20 Sachs Systemtechnik Gmbh, 8720 Schweinfurt Schliesseinrichtung

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE37986E1 (en) 1984-05-30 2003-02-11 The Chamberlain Group, Inc. Coding system for multiple transmitters and a single receiver
EP0257376A1 (fr) * 1986-08-12 1988-03-02 Siemens Aktiengesellschaft Installation de fermeture électronique comportant au moins une serrure, en particulier applicable aux véhicules automobiles
FR2606232A1 (fr) * 1986-10-31 1988-05-06 Neiman Sa Procede de codage evolutif de haute securite et dispositif de mise en oeuvre de ce procede
EP0269862A1 (fr) * 1986-10-31 1988-06-08 Valeo Neiman Procédé de codage évolutif de haute sécurité
FR2640104A1 (fr) * 1988-12-03 1990-06-08 Hella Kg Hueck & Co Dispositif de telecommande de moyens de securite tels que verrouillages centralises et securites antivol
GB2226593A (en) * 1988-12-30 1990-07-04 Ivan Anastasovski Digital electronic lock
DE4440349A1 (de) * 1994-11-11 1996-05-15 Bayerische Motoren Werke Ag Verfahren zum Synchronisieren zweier dialogfähiger Sender-Empfängereinheiten für ein Codesignal in einer Kraftfahrzeug-Schließanlage
DE9419635U1 (de) * 1994-12-09 1995-03-02 Engel, Gerhard, Dipl.-Ing., 41564 Kaarst Sicherungseinrichtung insbesondere für Kraftfahrzeuge
FR2738587A1 (fr) * 1995-09-08 1997-03-14 Kiekert Ag Procede de commande d'un dispositif de fermeture pour un vehicule automobile, muni d'un systeme de commande a distance ainsi que d'un transpondeur
DE19533732A1 (de) * 1995-09-12 1997-03-13 Koerling Franz Josef Elektronische Verschlußanlage

Also Published As

Publication number Publication date
EP0103791A3 (fr) 1984-09-05
DE3234539A1 (de) 1984-03-22
JPS5965175A (ja) 1984-04-13

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Inventor name: HAGEDORN, HORST, DIPL.-ASTR.

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

Inventor name: HEUWIESER, ERWIN, DIPL.-ING.