[go: up one dir, main page]

FR2607544A1 - Electronic lock with periodic code change - Google Patents

Electronic lock with periodic code change Download PDF

Info

Publication number
FR2607544A1
FR2607544A1 FR8616549A FR8616549A FR2607544A1 FR 2607544 A1 FR2607544 A1 FR 2607544A1 FR 8616549 A FR8616549 A FR 8616549A FR 8616549 A FR8616549 A FR 8616549A FR 2607544 A1 FR2607544 A1 FR 2607544A1
Authority
FR
France
Prior art keywords
code
time
electronic lock
message
lock according
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Withdrawn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
FR8616549A
Other languages
French (fr)
Inventor
Patrick Philippe
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.)
Valeo Neiman SA
Original Assignee
Neiman SA
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 Neiman SA filed Critical Neiman SA
Priority to FR8616549A priority Critical patent/FR2607544A1/en
Publication of FR2607544A1 publication Critical patent/FR2607544A1/en
Withdrawn legal-status Critical Current

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
    • G07C9/00174—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
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/04—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the shape
    • G06K19/041—Constructional details
    • G06K19/048—Constructional details the record carrier being shaped as a key
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Lock And Its Accessories (AREA)

Abstract

The invention relates to an electronic lock with a variable code of the type comprising an encoded-message emitter 1 and a receiver 6 for the said message, which receiver is formed by means 7 for reading the said received message, comparing the said received message with a message stored in memory, and emitting a control signal when the said messages agree. The electronic lock according to the invention is characterised in that the code varies as a function of time. Application to the motor vehicle industry.

Description

Serrure électronique à changement de code périodique.Electronic lock with periodic code change.

L'invention concerne une serrure électronique à code variable du type comprenant un émetteur d'un message codé et un récepteur dudit message formé de moyens de lecture dudit message reçu, de comparaison dudit message reçu-à un message contenu en mémoire et d'émission d'un signal de commande en cas de concordance entre lesdits messages.The invention relates to an electronic variable code lock of the type comprising a transmitter of a coded message and a receiver of said message formed by means of reading said received message, comparing said received message with a message contained in memory and transmitting a control signal in the event of agreement between said messages.

Une telle serrure électronique peut par exemple être utilisée comme télécommande d'accès à un véhicule automobile et/ ou d'utilisation de ce véhicule.Such an electronic lock can for example be used as a remote control for access to a motor vehicle and / or for use of this vehicle.

Dans les serrures électroniques connues, le message codé est fixe, ce qui présente l'inconvénient majeur d'une reproduction relativement facile lorsque le message codé a été enregistré.In known electronic locks, the coded message is fixed, which has the major drawback of relatively easy reproduction when the coded message has been recorded.

Pour pallier cet inconvénient, on a proposé de faire varier le code, par exemple à chaque utilisation, selon une loi plus ou moins aléatoire. Cette variation de code entraîne des difficultés de synchronisation entre émetteur et récepteur et une complication de l'ensemble de la serrure électronique.To overcome this drawback, it has been proposed to vary the code, for example at each use, according to a more or less random law. This variation in code leads to synchronization difficulties between transmitter and receiver and a complication of the entire electronic lock.

La présente invention vise à faire varier le code de maniere simple et sûre, afin d'augmenter considérablement la sécurité par rapport à un code fixe tout en limitant et simplifiant les problèmes de synchronisation entre émetteur et récepteur.The present invention aims to vary the code in a simple and safe manner, in order to considerably increase security compared to a fixed code while limiting and simplifying the synchronization problems between transmitter and receiver.

A cet effet, la serrure selon l'invention est caractérisée par le fait que le code varie en fonction du temps.To this end, the lock according to the invention is characterized in that the code varies as a function of time.

Cette variation, commandée par une horloge, peut être aussi aléatoire qu'on le veut, afin d'augmenter la sécurité. This variation, controlled by a clock, can be as random as desired, in order to increase security.

De préférence, le récepteur et l'émetteur comprennent chacun un afficheur de temps avec remise à l'heure, le récepteur et l'émetteur comportant des moyens de modification respectivement du code conservé en mémoire et du code émis, les codes du récepteur et de l'émetteur étant identiques lorsque les temps affichés par chacun d'eux sont les mêmes.Preferably, the receiver and the transmitter each comprise a time display with time reset, the receiver and the transmitter comprising means for respectively modifying the code kept in memory and the transmitted code, the codes of the receiver and of the transmitter being identical when the times displayed by each of them are the same.

Dans une forme de réalisation assurant une grande précision, les afficheurs de temps sont commandés par des oscillateurs à quartz ou des résonnateurs. De préférence, le circuit de commande comprend un microcalculateur, par exemple du type
CMOS.In an embodiment ensuring high precision, the time displays are controlled by quartz oscillators or resonators. Preferably, the control circuit comprises a microcomputer, for example of the type
CMOS.

La sauvegarde de l'heure dans l'émetteur peut être assurée par un condensateur ou une mémoire non volatile.The time can be saved in the transmitter by a capacitor or a non-volatile memory.

Pour l'émetteur, les défaillances ou débranchements de batterie pourront être assurés par un accumulateur électrique de faible capacité ou une mémoire non volatile.For the transmitter, failures or disconnections of the battery can be ensured by a low capacity electric accumulator or a non-volatile memory.

De préférence, le changement de code n'a pas lieu à heures fixes, mais selon une loi évitant le dépistage du système.Preferably, the code change does not take place at fixed times, but according to a law avoiding system screening.

Le message comprendra avantageusement un code indiquant l'heure, un code spécifique à chaque système, le code instantane et des bits de parité et de fin de message, le code spécifique déterminant l'évolution du code instantané en fonction du temps.The message will advantageously include a code indicating the time, a code specific to each system, the instantaneous code and parity and end of message bits, the specific code determining the evolution of the instantaneous code as a function of time.

De préférence, au moment du changement d'heure, le récepteur acceptera pendant un temps prédéterminé à la fois le code précédent et le nouveau code (pour palier à une légère désynchronisation des horloges).Preferably, when the time changes, the receiver will accept for a predetermined time both the previous code and the new code (to compensate for a slight desynchronization of the clocks).

La programmation du code spécifique peut se faire par tous moyens connus, tels que liaisons sur circuit imprimé, coupures de pistes sur circuit imprimé, programmation d'une mémoire interne ou externe, roues codenses, etc. The programming of the specific code can be done by any known means, such as connections on printed circuit, clipping of tracks on printed circuit, programming of an internal or external memory, codenses wheels, etc.

La programmation de l'heure peut se faire par afficheur analogique (figure 1), afficheur numérique (figure 2) ou par clavier (figure 3).Time programming can be done by analog display (Figure 1), digital display (Figure 2) or by keyboard (Figure 3).

La figure 4 représente un schéma synoptique de la serrure électronique selon un exemple de réalisation de l'invention.FIG. 4 represents a block diagram of the electronic lock according to an exemplary embodiment of the invention.

L'émetteur 1 comprend un circuit de changement d'heure 2 et un circuit de changement de code spécifique 2' commandés par un calculateur 3 qui contrôle un afficheur de temps 4.The transmitter 1 includes a time change circuit 2 and a specific code change circuit 2 'controlled by a computer 3 which controls a time display 4.

L'émetteur 1 comprend en outre un organe de transmission 5, par exemple par voie optique (infrarouge) ou radiofréquence, du contenu du calculateur 3.The transmitter 1 further comprises a transmission member 5, for example by optical (infrared) or radiofrequency, of the content of the computer 3.

Le récepteur 6 comprend une section de réception des messages transmis par l'organe 5. Ces messages sont analysés dans un calculateur 7 qui commande une montre 8 pouvant servir de pendule de bord. Le calculateur 7 reçoit par ailleurs un circuit de changement d'heure 9 et un circuit de changement de code spécifique 10.The receiver 6 comprises a section for receiving the messages transmitted by the member 5. These messages are analyzed in a computer 7 which controls a watch 8 which can serve as an on-board pendulum. The computer 7 also receives a time change circuit 9 and a specific code change circuit 10.

Le signal de commande émis par le calculateur 7, en cas de concordance entre le message envoyé par l'organe de transmission 5 et le message qu'il contient, est envoyé à un interface de puissance 11 commandant alternativement le déverrouillage 12 et le verrouillage 13.The control signal emitted by the computer 7, in the event of agreement between the message sent by the transmission unit 5 and the message it contains, is sent to a power interface 11 alternately controlling the unlocking 12 and the locking 13 .

Les calculateurs 3 et 7 peuvent être indifféremment soit des microprocesseurs, des circuits intégrés spécifiques, des circuits intégrés prediffusés ou des circuits précaractérisés. The computers 3 and 7 can be either microprocessors, specific integrated circuits, prediffused integrated circuits or precharacterized circuits.

Claims (9)

REVENDICATIONS 1.- Serrure électronique à code variable du type comprenant un émetteur (1) d'un message codé et un récepteur (6) dudit message formé de moyens (7) de lecture dudit message reçu, de comparaison dudit message reçu à un message contenu en mémoire et d'emission d'un signal de commande en cas de concordance entre lesdits messages, caractérisée par le fait que le code varie en fonction du temps.1.- Electronic variable code lock of the type comprising a transmitter (1) of a coded message and a receiver (6) of said message formed by means (7) of reading said received message, of comparing said received message with a contained message in memory and transmission of a control signal in the event of agreement between said messages, characterized in that the code varies as a function of time. 2.- Serrure électronique selon la revendication 1, caractérisee par le fait que le récepteur (6) et l'émetteur (1) comprennent chacun un afficheur de temps (8,4) avec remise à l'heure, le récepteur (6) et l'émetteur (1) comportant des moyens de modification respectivement du code conservé en mémoire et du code émis, les codes du récepteur (6) et de l'émetteur (1) étant identiques lorsque les temps affichés par chacun d'eux sont les mêmes.2. Electronic lock according to claim 1, characterized in that the receiver (6) and the transmitter (1) each comprise a time display (8,4) with time reset, the receiver (6) and the transmitter (1) comprising means for respectively modifying the code kept in memory and the transmitted code, the codes of the receiver (6) and of the transmitter (1) being identical when the times displayed by each of them are the same. 3.- Serrure électronique selon l'une des revendications 1 et 2, caractérisée par le fait que les afficheurs de temps (4,8) sont commandés par des oscillateurs à quartz ou des résonnateurs.3.- Electronic lock according to one of claims 1 and 2, characterized in that the time displays (4,8) are controlled by quartz oscillators or resonators. 4.- Serrure électronique selon la revendication 3, caractérisee par le fait que le circuit de commande comprend un calculateur, par exemple du type CMOS.4. Electronic lock according to claim 3, characterized in that the control circuit comprises a computer, for example of the CMOS type. 5.- Serrure électronique selon l'une des revendications 1 à 4, caractérisée par le fait que la sauvegarde de l'heure dans l'metteur (1) est assurée par un condensateur ou une mémoire non volatile.5.- Electronic lock according to one of claims 1 to 4, characterized in that the saving of the time in the transmitter (1) is provided by a capacitor or a non-volatile memory. 6.- Serrure électronique selon l'une des revendications 1 à 5, caractérisée par le fait que les défaillances ou débranchements de batterie pour l'émetteur (1) sont assurés par un accumulateur électrique de faible capacité ou une mémoire non volatile. 6.- Electronic lock according to one of claims 1 to 5, characterized in that the failures or disconnections of the battery for the transmitter (1) are ensured by an electric accumulator of low capacity or a non-volatile memory. 7.- Serrure électronique selon l'une des revendications 1 à 6, caractérisée par le fait que le changement de code n'a pas lieu à heures fixes, mais selon une loi évitant le dépistage du système.7.- Electronic lock according to one of claims 1 to 6, characterized in that the code change does not take place at fixed times, but according to a law avoiding system screening. 8.- Serrure électronique selon l'une des revendications 1 à 7, caractérisée par le fait que le message comprend un code indiquant l'heure, un code spécifique à chaque système, le code instantané et des bits de parité et de fin de message, le code spécifique déterminant l'évolution du code in instantané en fonction du temps.8.- Electronic lock according to one of claims 1 to 7, characterized in that the message includes a code indicating the time, a code specific to each system, the instantaneous code and parity and end of message bits , the specific code determining the evolution of the instant code as a function of time. 9.- Serrure électronique selon l'une des revendications 1 à 8, caractérisée par le fait qu'au moment du changement d'heure, le récepteur acceptera pendant un temps prédéterminé à la fois le code précédent et le nouveau code. 9. Electronic lock according to one of claims 1 to 8, characterized in that at the time change of time, the receiver will accept for a predetermined time both the previous code and the new code.
FR8616549A 1986-11-27 1986-11-27 Electronic lock with periodic code change Withdrawn FR2607544A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8616549A FR2607544A1 (en) 1986-11-27 1986-11-27 Electronic lock with periodic code change

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8616549A FR2607544A1 (en) 1986-11-27 1986-11-27 Electronic lock with periodic code change

Publications (1)

Publication Number Publication Date
FR2607544A1 true FR2607544A1 (en) 1988-06-03

Family

ID=9341277

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8616549A Withdrawn FR2607544A1 (en) 1986-11-27 1986-11-27 Electronic lock with periodic code change

Country Status (1)

Country Link
FR (1) FR2607544A1 (en)

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0311112A3 (en) * 1987-10-07 1989-11-23 Seiko Epson Corporation Remote control transmitting/receiving system
EP0372110A1 (en) * 1987-05-26 1990-06-13 Hai Cheng Chen A security system
FR2652216A1 (en) * 1989-09-20 1991-03-22 Rockwell Cim METHOD AND DEVICE FOR GENERATING AND VALIDATING A DIGITAL MESSAGE AND APPLICATION OF SUCH A DEVICE.
WO1991006926A1 (en) * 1989-10-31 1991-05-16 Security Dynamics Technologies, Inc. Method and apparatus for secure identification and verification
EP0459781A1 (en) * 1990-05-29 1991-12-04 Microchip Technology Inc. Method and Apparatus for Use in an Access Control System
FR2678755A1 (en) * 1991-06-07 1993-01-08 Trw Sipea Spa OPTIMIZED SECURITY REMOTE.
EP0577328A3 (en) * 1992-07-02 1995-10-25 American Telephone & Telegraph Secure toll collection system for moving vehicles
EP0698706A1 (en) * 1994-08-26 1996-02-28 TEMIC TELEFUNKEN microelectronic GmbH Method for operating a locking system for lockable objects
US6108326A (en) * 1997-05-08 2000-08-22 Microchip Technology Incorporated Microchips and remote control devices comprising same
US6154544A (en) 1995-05-17 2000-11-28 The Chamberlain Group, Inc. Rolling code security system
US6166650A (en) * 1991-05-29 2000-12-26 Microchip Technology, Inc. Secure self learning system
FR2823167A1 (en) * 2001-03-30 2002-10-11 Siemens Ag DEVICE FOR CONTROLLING A SECURITY DEVICE
US6690796B1 (en) 1995-05-17 2004-02-10 The Chamberlain Group, Inc. Rolling code security system
WO2004057543A1 (en) * 2002-12-06 2004-07-08 Koninklijke Philips Electronics N.V. System and method for providing passenger security and convenience in a public transportation terminal
US6980655B2 (en) 2000-01-21 2005-12-27 The Chamberlain Group, Inc. Rolling code security system
US6985583B1 (en) 1999-05-04 2006-01-10 Rsa Security Inc. System and method for authentication seed distribution
US7363494B2 (en) 2001-12-04 2008-04-22 Rsa Security Inc. Method and apparatus for performing enhanced time-based authentication
US8370638B2 (en) 2005-02-18 2013-02-05 Emc Corporation Derivative seeds
ITMI20120028A1 (en) * 2012-01-12 2013-07-13 Sixs S R L Soluzioni Informatich E Per Il Socia METHOD AND SYSTEM OF CERTIFICATION OF THE PRESENCE OF AN OPERATOR
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
US12149618B2 (en) 2005-01-27 2024-11-19 The Chamberlain Group Llc Method and apparatus to facilitate transmission of an encrypted rolling code

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0042886A1 (en) * 1980-07-01 1982-01-06 Iwasaki Engineering Co., Ltd. Electronic locking device
WO1985003785A1 (en) * 1984-02-22 1985-08-29 Gordian Systems, Inc. Solid state key for controlling access to computer software

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0042886A1 (en) * 1980-07-01 1982-01-06 Iwasaki Engineering Co., Ltd. Electronic locking device
WO1985003785A1 (en) * 1984-02-22 1985-08-29 Gordian Systems, Inc. Solid state key for controlling access to computer software

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IEEE 1976 INTERNATIONAL ZURICH SEMINAR ON DIGITAL COMMUNICATIONS, Interaction between circuit implementation and system design planning, operational and user aspects, 9-11 mars 1976, Zurich, Swiss Federal Institute of Technology, pages F6.1 - F6.5, IEEE, Long Beach, US; W.R.WIDMER: "Message authentication, a special identification requirement in one-way digital data transmission" *

Cited By (47)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0372110A1 (en) * 1987-05-26 1990-06-13 Hai Cheng Chen A security system
EP0311112A3 (en) * 1987-10-07 1989-11-23 Seiko Epson Corporation Remote control transmitting/receiving system
FR2652216A1 (en) * 1989-09-20 1991-03-22 Rockwell Cim METHOD AND DEVICE FOR GENERATING AND VALIDATING A DIGITAL MESSAGE AND APPLICATION OF SUCH A DEVICE.
EP0419306A1 (en) * 1989-09-20 1991-03-27 ROCKWELL BODY AND CHASSIS SYSTEMS - FRANCE, en abrégé: ROCKWELL BCS - FRANCE Method and apparatus for generating and validating a numerical message and application of such an apparatus
WO1991006926A1 (en) * 1989-10-31 1991-05-16 Security Dynamics Technologies, Inc. Method and apparatus for secure identification and verification
EP0459781A1 (en) * 1990-05-29 1991-12-04 Microchip Technology Inc. Method and Apparatus for Use in an Access Control System
US5517187A (en) * 1990-05-29 1996-05-14 Nanoteq (Pty) Limited Microchips and remote control devices comprising same
US6166650A (en) * 1991-05-29 2000-12-26 Microchip Technology, Inc. Secure self learning system
FR2678755A1 (en) * 1991-06-07 1993-01-08 Trw Sipea Spa OPTIMIZED SECURITY REMOTE.
EP0577328A3 (en) * 1992-07-02 1995-10-25 American Telephone & Telegraph Secure toll collection system for moving vehicles
EP0698706A1 (en) * 1994-08-26 1996-02-28 TEMIC TELEFUNKEN microelectronic GmbH Method for operating a locking system for lockable objects
US8284021B2 (en) 1995-05-17 2012-10-09 The Chamberlain Group, Inc. Rolling code security system
US6154544A (en) 1995-05-17 2000-11-28 The Chamberlain Group, Inc. Rolling code security system
US8633797B2 (en) 1995-05-17 2014-01-21 The Chamberlain Group, Inc. Rolling code security system
US6690796B1 (en) 1995-05-17 2004-02-10 The Chamberlain Group, Inc. Rolling code security system
US8233625B2 (en) 1995-05-17 2012-07-31 The Chamberlain Group, Inc. Rolling code security system
US8194856B2 (en) 1995-05-17 2012-06-05 The Chamberlain Group, Inc. Rolling code security system
US7623663B2 (en) 1995-05-17 2009-11-24 The Chamberlain Group, Inc. Rolling code security system
US7412056B2 (en) 1995-05-17 2008-08-12 The Chamberlain Group, Inc. Rolling code security system
US7492898B2 (en) 1995-05-17 2009-02-17 The Chamberlain Group, Inc. Rolling code security system
US6108326A (en) * 1997-05-08 2000-08-22 Microchip Technology Incorporated Microchips and remote control devices comprising same
US6985472B2 (en) 1997-05-08 2006-01-10 Microchip Technology Incorporated Method of communication using an encoder microchip and a decoder microchip
US7502467B2 (en) 1999-05-04 2009-03-10 Rsa Security Inc. System and method for authentication seed distribution
US6985583B1 (en) 1999-05-04 2006-01-10 Rsa Security Inc. System and method for authentication seed distribution
US6980655B2 (en) 2000-01-21 2005-12-27 The Chamberlain Group, Inc. Rolling code security system
FR2823167A1 (en) * 2001-03-30 2002-10-11 Siemens Ag DEVICE FOR CONTROLLING A SECURITY DEVICE
US7363494B2 (en) 2001-12-04 2008-04-22 Rsa Security Inc. Method and apparatus for performing enhanced time-based authentication
WO2004057543A1 (en) * 2002-12-06 2004-07-08 Koninklijke Philips Electronics N.V. System and method for providing passenger security and convenience in a public transportation terminal
US10944559B2 (en) 2005-01-27 2021-03-09 The Chamberlain Group, Inc. Transmission of data including conversion of ternary data to binary data
US12149618B2 (en) 2005-01-27 2024-11-19 The Chamberlain Group Llc Method and apparatus to facilitate transmission of an encrypted rolling code
US11799648B2 (en) 2005-01-27 2023-10-24 The Chamberlain Group Llc Method and apparatus to facilitate transmission of an encrypted rolling code
US8370638B2 (en) 2005-02-18 2013-02-05 Emc Corporation Derivative seeds
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
WO2013104962A1 (en) * 2012-01-12 2013-07-18 Sixs S.R.L. - Soluzioni Informatiche Per Il Sociale Method and system for certifying the presence of an operator
ITMI20120028A1 (en) * 2012-01-12 2013-07-13 Sixs S R L Soluzioni Informatich E Per Il Socia METHOD AND SYSTEM OF CERTIFICATION OF THE PRESENCE OF AN OPERATOR
US11778464B2 (en) 2017-12-21 2023-10-03 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
US12108248B2 (en) 2017-12-21 2024-10-01 The Chamberlain Group Llc Security system for a moveable barrier operator
US10652743B2 (en) 2017-12-21 2020-05-12 The Chamberlain Group, Inc. Security system for a moveable barrier operator
US12056971B1 (en) 2018-06-27 2024-08-06 The Chamberlain Group Llc. Network-based control of movable barrier operators for autonomous vehicles
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
US11869289B2 (en) 2018-08-01 2024-01-09 The Chamberlain Group Llc Movable barrier operator and transmitter pairing over a network
US11423717B2 (en) 2018-08-01 2022-08-23 The Chamberlain Group Llc Movable barrier operator and transmitter pairing over a network
US12354422B2 (en) 2018-08-01 2025-07-08 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

Similar Documents

Publication Publication Date Title
FR2607544A1 (en) Electronic lock with periodic code change
EP0709254B1 (en) Data communications system using carrier currents, in particular for a vehicle
EP0186248B1 (en) Remote control receiver using a modulated carrier wave
WO1994002923A1 (en) Urban transport user information system
GB2240418A (en) Remote control of e.g. automotive vehicle doors
EP3306576A1 (en) Method and system for secure access to a determined space by means of a portable object
FR2736600A1 (en) ELECTRONIC CONTROL APPARATUS FOR A MOTOR VEHICLE HAVING COMPUTER NETWORKS AND AN IMMOBILIZER DEVICE
FR2785112A1 (en) EMBEDDED BEACON, PARTICULARLY FOR THE MANAGEMENT OF VEHICLE FLEETS
EP1183657B1 (en) Device for displaying the time of parking of a vehicle
EP1405466B1 (en) Wake-up system for stations associated for implementing at least a distributed function, in particular in a motor vehicle
FR2596546A1 (en) DEVICE FOR ACQUIRING DATA RELATING TO THE USE OF VEHICLES IN A FLEET
FR2586446A1 (en) IMPROVED SECURITY DEVICE
EP0147276B1 (en) Coded control devices
CH686469B5 (en) Timepiece to take stock.
EP0650267A1 (en) Transmission system
FR2519209A1 (en) DIGITAL LOOP FILTER
EP1236174B1 (en) System for manipulating a virtual object in an interactive environment
EP0658838B1 (en) Frequency synthesizer
EP0125624B1 (en) Device for the electromagnetic transmission of an event in a disturbed environment
EP0957589B1 (en) System for communication between two units
FR2573881A1 (en) Multi-use remote control apparatus
JPH06102941B2 (en) Remote control system
FR2640098A1 (en) DEVICE FOR SYNCHRONIZING THE TRANSMISSION AND RECEPTION OF A STATION OF A COMMUNICATION NETWORK IN PARTICULAR FOR A MOTOR VEHICLE
EP0843447A1 (en) Method for the transmission of asynchronous NRZ signals using frequency modulation
EP0490008A1 (en) Security lock with electro-mechanical key

Legal Events

Date Code Title Description
ST Notification of lapse