EP0385070A1 - Système de commande à distance avec transmission de code à mots de code - Google Patents

Système de commande à distance avec transmission de code à mots de code Download PDF

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Publication number
EP0385070A1
EP0385070A1 EP90100689A EP90100689A EP0385070A1 EP 0385070 A1 EP0385070 A1 EP 0385070A1 EP 90100689 A EP90100689 A EP 90100689A EP 90100689 A EP90100689 A EP 90100689A EP 0385070 A1 EP0385070 A1 EP 0385070A1
Authority
EP
European Patent Office
Prior art keywords
transmitter
codeword
receiver
marked
basic
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.)
Granted
Application number
EP90100689A
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German (de)
English (en)
Other versions
EP0385070B1 (fr
Inventor
Martin Lindmayer
Klaus Claar
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.)
Daimler Benz AG
Original Assignee
Daimler Benz 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 Daimler Benz AG filed Critical Daimler Benz AG
Publication of EP0385070A1 publication Critical patent/EP0385070A1/fr
Application granted granted Critical
Publication of EP0385070B1 publication Critical patent/EP0385070B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G07C9/00174—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 securing code words of a telecontrol system with the features of the preamble of claim 1 and to a telecontrol system according to the preamble of claim 6, which is particularly suitable for carrying out the method.
  • a generic method can be derived from the operation of a particular provided for central locking systems of motor vehicles known telemetry system (DE 36 36 822 C1).
  • the wirelessly transmitted codewords of this telecontrol system are protected against unauthorized recording and use by a variable according to a predetermined algorithm proportion of each regarded as currently considered codeword in the receiver and in the last used transmitter synchronously progressed.
  • the algorithm relies on both the receiver and the transmitter in EEPROMs stored, usually unchangeable, original codeword ("key code word").
  • each code word of the generic telecontrol system may also contain so-called system bits that for different distinctions -.
  • system bits As key types (main / secondary key), car make, key system, currently controllable function, etc. - can be used. These system bits are excluded from the algorithmic modification according to a variant of the known system. However, one or more system bit (s) may nevertheless be arbitrarily changed by the user of the transmitter - by means of switches provided in addition to the transmit button on the transmitter - in order to change the function controllable or triggerable by the transmitter without influencing the progression algorithm.
  • the receiver can be manually switched to a "learning phase" with an open door of the vehicle by means of an electrical switch.
  • the key code word of the receiver is reprogrammed, namely necessarily including the system bits mentioned, by re-storing the code word next transmitted to the receiver by any sender suitable for the general system.
  • This new original codeword is then accepted and stored as being subject to each subsequent codeword transmission of the switch according to the predetermined algorithm.
  • a codeword stored in an existing transmitter can be completely reset by removing the battery from the transmitter. Thereafter, the above-described "learning process" of the receiver - with the transmitter with a reset code - can be performed again. This is especially recommended for shortening the synchronization if the code words in the sender and receiver have been switched on once differently far. Of course, even an unauthorized person by temporary removal of the battery from the transmitter in his possession perform the described reset process in the transmitter.
  • each transmitter is assigned different identifiers, which are primarily broadcast on actuation of the respective transmitter.
  • a downstream of the receiver decoding device is equipped for processing the different from transmitter to transmitter set of codewords with a plurality of decoder channels corresponding to the number of transmitters, which can be switched by the transmitter detectors.
  • the invention has the object to provide a method by which code words of a telecontrol system can be better protected and the generic telecontrol system so that the inventive method can be performed so that several equal transmitters should be used side by side. This object is achieved with the characterizing features of method claim 1 and the device claim 6 according to the invention.
  • each transmitter of the telecontrol system is assigned an individual unchangeable basic component of all code words. This is therefore object and transmitter specific.
  • a total supply of all individual basic shares must be stored in the object or receiver, which corresponds at least to the number of independently supplied parallel use transmitter.
  • the permanent storage of the object-specific shares must be removed from any write access, so z. B. in ROMs. It can be linked in a suitable manner with the only temporary storage of the variable components or else be present in completely, ie also physically separate memories. This has the advantage that, in contrast to the prior art no longer any available in the spare parts dealer transmitter for storing a new current codeword can be used in the receiver, even if a transmitter RESET was performed and the mechanical fuse was overcome.
  • user-specific components may also be contained in the basic components which, in the event of transmitter operation, already communicate certain user data to the receiver or the object in advance.
  • user-specific code portions are already known; they affect the motor vehicle application of a telecontrol system z. B. on adjustable vehicle components such as seats or rearview mirror.
  • Unauthorized use of the telecontrol system with a lost transmitter can be very effectively fended off if any codeword - basic part, the one - on the one hand already used at least once and - on the other not used in a read-in process Sender is assigned, automatically invalidated - ie locked or deleted - is.
  • This automatic backup function can be made dependent on various conditions:
  • the at least one use of the transmitter whose codeword basic part is to be blocked can, for. B. can be detected by registering a Codefortschaltevorgangs in the attributable variable portion of the same codeword.
  • the backup function can basically be executed during the final confirmation of a read-in operation performed with several transmitters. - It can be executed depending on the order of reading, e.g.
  • the single figure shows a highly schematic of the essential components of the invention for the telecontrol system.
  • n is stored in n memory locations SP1 to SP n a total of n codewords CW1 to CW n . It corresponds to at least a number m of associated transmitters S1 to S m , for the respective object to parallel, independent use -. B. by different people - to be delivered.
  • the number m of the transmitter S1 to S m may be less than or equal to n.
  • m 3.
  • Each code word CW1 to CW n exists - From a fixed base share CWG1, CWG2 etc., which is object and transmitter specific and can not be changed, ie z. B.
  • ROMs read only memory
  • CWV1, CWV2, etc. variable proportion CWV1, CWV2, etc.
  • the latter is not essential to the invention and is therefore not explained here.
  • the memory locations SP... are shown uniformly for the sake of clarity for the invariable basic components and the variable components, but may well have different structures, in particular also be physically separated from one another.
  • the codewords CW ... are shown here clearly as sequences of decimal numbers; It goes without saying that the nature of the code used and also the nature of the transmission of the code words between transmitters and receivers for the essence of the invention is completely irrelevant. Any code or transmission types (infrared, ultrasound, radio) can be used. Obviously, the variable parts CWV ... of the codewords are also different; Since these are algorithmically advanced by the control device 1 in each case after a code transmission independently of the other variable components, at most coincidentally once in two or more code words same variable components CWV ... occur. Of course, these codewords still differ in their basic components CWG ....
  • Each transmitter S1 to S3 contains in a known manner a code - transmission element, here an infrared diode IS, which can be activated by pressing a send button ST for transmitting the current codeword stored in each transmitter CW.
  • a code - transmission element here an infrared diode IS
  • CW1 to CW3 the transmitter S1 to S3 with those in the memory locations SP1 to SP3 of the control device 1 completely match.
  • An infrared receiver IE of the motor vehicle K forwards each received codeword CW ... in a known manner to the control device, where it is prior to being executed any by transmitter S ... controllable function - ie z.
  • the controller 1 does not respond to code words of a foreign or desynchronized transmitter. It is understood that more than one receiver IE can be provided; but it remains at a central control device.
  • this reset button 2 all changeable components CWV 1... N of the code words CW 1... N in the memories SP 1... N of the control device 1 can be reset independently of a transmitter operation to defined initial states, which can also be different among one another become. This reset allows the vehicle owner to immediately prevent loss of a transmitter that unauthorized persons use the lost transmitter to control its assigned function can. Of course, the current code words in the channels will not be reset.
  • the memory contents of the control device 1 must be synchronized with the corresponding memory contents of the transmitter S ... which is still present in the vehicle owner in order to ensure their further usability.
  • a new reading code transmission from each of these transmitters to the receiver must be performed.
  • each first, each with a transmitter made after a reset code transfer is considered.
  • the object- and transmitter-specific codeword - basic components CWG ... is always - Checks the read code word on whether at least one "matching" basic share CWG ...
  • a validator 4 - the z. B. a read lock for memory locations SP or can control a deletion of the respective memory contents - it is under the specific conditions already mentioned possible to devalue even the immutable bases CWG ... or the complete codewords CW ..., the lost channels were assigned.
  • the validator 4 is z. B. activated by final actuation of the switch 3.
EP90100689A 1989-02-24 1990-01-13 Système de commande à distance avec transmission de code à mots de code Expired - Lifetime EP0385070B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3905651 1989-02-24
DE3905651A DE3905651A1 (de) 1989-02-24 1989-02-24 Verfahren zur sicherung von codeworten eines fernwirksystems und fernwirksystem mit durch codeworte uebertragbarem code

Publications (2)

Publication Number Publication Date
EP0385070A1 true EP0385070A1 (fr) 1990-09-05
EP0385070B1 EP0385070B1 (fr) 1994-02-16

Family

ID=6374777

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90100689A Expired - Lifetime EP0385070B1 (fr) 1989-02-24 1990-01-13 Système de commande à distance avec transmission de code à mots de code

Country Status (5)

Country Link
US (1) US5159329A (fr)
EP (1) EP0385070B1 (fr)
JP (1) JPH0771339B2 (fr)
DE (1) DE3905651A1 (fr)
ES (1) ES2051390T3 (fr)

Cited By (16)

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WO1993016261A1 (fr) * 1992-02-17 1993-08-19 Securitas Ab Procede de transport d'objets de valeur
DE4323330A1 (de) * 1992-07-13 1994-01-20 Vaillant Joh Gmbh & Co Sende-Empfänger-Funkstrecke
EP0618097A1 (fr) * 1993-03-31 1994-10-05 WEBASTO THERMOSYSTEME GmbH Appareil de commande à distance
ES2070044A2 (es) * 1992-10-19 1995-05-16 Trw Sipea Spa Telemando especialmente para un vehiculo.
WO1995017739A1 (fr) * 1993-12-22 1995-06-29 Systhema S.R.L Dispositif electronique permettant de commander des installations telles que des ensembles anti-vol, des gaches electriques, des commutateurs et analogues
EP0704352A1 (fr) * 1994-09-28 1996-04-03 Honda Giken Kogyo Kabushiki Kaisha Dispositif antivol pour véhicule
WO1996006499A3 (fr) * 1994-08-09 1996-04-11 Philips Electronics Nv Procede et dispositif de transfert de donnees protegees
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
EP0724056A1 (fr) * 1995-01-25 1996-07-31 ALIADE (Société Anonyme) Dispositif de commande à distance par ondes hertziennes, infrarouges ou analogues, de systèmes de fermeture motorisés
WO1996033328A3 (fr) * 1995-04-20 1996-11-21 Directed Electronics Inc Perfectionnement d'un systeme de code de sauts integre
WO1997030424A1 (fr) * 1996-02-15 1997-08-21 Misko, Patrick Procede pour faire autoriser par un serveur l'acces a un service a partir de dispositifs portatifs a microcircuits electroniques du type carte a memoire par exemple
WO1998007940A1 (fr) * 1996-08-23 1998-02-26 Ut Automotive Dearborn, Inc. Procede et appareil pour la programmation sur site d'un systeme de commande a distance
US5841363A (en) * 1993-10-01 1998-11-24 Marquardt Gmbh Locking system especially for automobiles
EP0771094A3 (fr) * 1995-10-26 2000-02-23 Elektronik Service & Vertrieb GmbH Procédé et dispositif de génération et de reconnaissance de l'authenticité de signaux de commande
DE19960783A1 (de) * 1999-12-16 2001-06-21 Mannesmann Vdo Ag Vorrichtung zur Aktivierung und/oder Deaktivierung einer Sicherheitseinrichtung
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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993016261A1 (fr) * 1992-02-17 1993-08-19 Securitas Ab Procede de transport d'objets de valeur
DE4323330A1 (de) * 1992-07-13 1994-01-20 Vaillant Joh Gmbh & Co Sende-Empfänger-Funkstrecke
ES2070044A2 (es) * 1992-10-19 1995-05-16 Trw Sipea Spa Telemando especialmente para un vehiculo.
EP0618097A1 (fr) * 1993-03-31 1994-10-05 WEBASTO THERMOSYSTEME GmbH Appareil de commande à distance
US5841363A (en) * 1993-10-01 1998-11-24 Marquardt Gmbh Locking system especially for automobiles
WO1995017739A1 (fr) * 1993-12-22 1995-06-29 Systhema S.R.L Dispositif electronique permettant de commander des installations telles que des ensembles anti-vol, des gaches electriques, des commutateurs et analogues
WO1996006499A3 (fr) * 1994-08-09 1996-04-11 Philips Electronics Nv Procede et dispositif de transfert de donnees protegees
EP0704352A1 (fr) * 1994-09-28 1996-04-03 Honda Giken Kogyo Kabushiki Kaisha Dispositif antivol pour véhicule
EP0711892A1 (fr) * 1994-11-11 1996-05-15 Bayerische Motoren Werke Aktiengesellschaft Procédé destiné à synchroniser deux unités conversationnelles sur un signal codé dans une installation de verrouillage d'un véhicule à moteur
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
EP0724056A1 (fr) * 1995-01-25 1996-07-31 ALIADE (Société Anonyme) Dispositif de commande à distance par ondes hertziennes, infrarouges ou analogues, de systèmes de fermeture motorisés
WO1996033328A3 (fr) * 1995-04-20 1996-11-21 Directed Electronics Inc Perfectionnement d'un systeme de code de sauts integre
EP0771094A3 (fr) * 1995-10-26 2000-02-23 Elektronik Service & Vertrieb GmbH Procédé et dispositif de génération et de reconnaissance de l'authenticité de signaux de commande
WO1997030424A1 (fr) * 1996-02-15 1997-08-21 Misko, Patrick Procede pour faire autoriser par un serveur l'acces a un service a partir de dispositifs portatifs a microcircuits electroniques du type carte a memoire par exemple
FR2745135A1 (fr) * 1996-02-15 1997-08-22 Cedric Colnot Procede pour faire autoriser par un serveur l'acces a un service a partir de dispositifs portatifs a microcircuits electroniques du type carte a memoire par exemple
WO1998007940A1 (fr) * 1996-08-23 1998-02-26 Ut Automotive Dearborn, Inc. Procede et appareil pour la programmation sur site d'un systeme de commande a distance
US6455490B1 (en) 1999-06-10 2002-09-24 Unilever Home & Personal Care Usa Division Of Conopco, In.C Granular detergent component containing zeolite map and laundry detergent compositions
DE19960783A1 (de) * 1999-12-16 2001-06-21 Mannesmann Vdo Ag Vorrichtung zur Aktivierung und/oder Deaktivierung einer Sicherheitseinrichtung

Also Published As

Publication number Publication date
US5159329A (en) 1992-10-27
DE3905651C2 (fr) 1992-04-09
ES2051390T3 (es) 1994-06-16
EP0385070B1 (fr) 1994-02-16
JPH0771339B2 (ja) 1995-07-31
JPH02250497A (ja) 1990-10-08
DE3905651A1 (de) 1990-08-30

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