EP1144784B1 - Secure system for controlling the unlocking of at least one motor vehicle opening panel - Google Patents
Secure system for controlling the unlocking of at least one motor vehicle opening panel Download PDFInfo
- Publication number
- EP1144784B1 EP1144784B1 EP00974644A EP00974644A EP1144784B1 EP 1144784 B1 EP1144784 B1 EP 1144784B1 EP 00974644 A EP00974644 A EP 00974644A EP 00974644 A EP00974644 A EP 00974644A EP 1144784 B1 EP1144784 B1 EP 1144784B1
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- European Patent Office
- Prior art keywords
- transmission
- pseudo
- signal
- random code
- code
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- 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.)
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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
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- 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
- G07C2009/0042—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 the transmitted data signal containing a code which is changed
- G07C2009/00476—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 the transmitted data signal containing a code which is changed dynamically
-
- 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
- G07C2009/00793—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 Hertzian waves
Definitions
- the present invention relates to secure systems for control for unlocking at least one vehicle leaf automobile.
- the transponder Upon receipt of a radio frequency interrogation signal from of the vehicle, the transponder emits a signal by itself in response radio frequency identification. When this signal is received and identified by means provided for this purpose on the vehicle, these means control the unlocking the sash.
- Such a system is completely transparent to the user, since the unlocking of the doors is controlled without the user having to perform operations other than that consisting in handling the door handle.
- some “malicious” people may copy the interrogation signal sent from the vehicle to re-transmit it to proximity to the transponder, even when the user carrying this transponder would be in a place far from the vehicle.
- they memorize the signal identification issued in response by the transponder and re-emit this signal in the vicinity of the vehicle to obtain the unlocking of the doors of this one.
- An object of the invention is to propose a solution allowing to prevent this type of diversion.
- the invention provides a system for controlling means for locking / unlocking at least one opening of vehicle, in particular automobile, comprising means transmission / reception which are carried by the vehicle and means transmission / reception which are intended to be worn by a user and which, upon receipt of an interrogation signal emitted by the means emission / reception of the vehicle, are intended to emit a signal of response capable of controlling the actuation of the unlocking of the opening, characterized in that the transmission / reception means on the vehicle and the user transmission / reception means each comprise means memory forming circular shift register in which are stored at least one pseudo-random code, the transmission / reception means on the vehicle comprising means for transmitting a signal of interrogation which carries such a pseudo-random code, the means transmission / reception of the user comprising means for despreading the signal received if the pseudo-random code carried by said signal is synchronized with a corresponding pseudo-random code stored in their memory means and further comprising means for transmitting in responds to a signal which carries
- FIG. 1 shows a vehicle V which carries means 1 RF transmission / reception intended to exchange with a module 2 RF transmission / reception carried by a user and presented by example in the form of a badge.
- the transmission / reception means 1 comprise an antenna 3 arranged for example near a door handle of the vehicle, or therein, a management unit 5, as well as means 4 for conversion signal interposed between the antenna 3 and the management unit 5.
- the signal conversion means 4 include in particular means 6 for modulating or demodulating an RF signal transmitted or received by antenna 3, a circular shift register 7 in which is stored a pseudo-random code, as well as mixing means 8 which are mounted between the management unit 5 and said means 6 for modulation / demodulation and which are able to mix the pseudo-random code with the signal demodulated by means 6 or with a signal transmitted by the management unit 5.
- the pseudo-random code of the register to circular offset 7 is cyclically swapped around on itself at some clock frequency.
- the badge 2 includes an antenna 9, a management unit 11 and signal conversion means 10 interposed between the antenna 9 and the management unit 11.
- the signal conversion means 10 also include way that means 4, means 12 for modulating or demodulating a RF signal transmitted or received by the antenna 9, a circular shift register 13 in which a pseudo-random code identical to that stored is stored in register 7, as well as mixing means 14 which are mounted between the management unit 11 and said modulation / demodulation means 12 and which are able to mix the pseudo-random code with the signal demodulated by means 12 or with a signal transmitted by the unit of management 11.
- the pseudo-random code of the circular shift register 13 is cyclically swapped at itself at the same clock frequency as that of the shift register 7.
- Vehicle V includes means for enabling detect the presence of an individual near the vehicle. These means are for example made up of sensors arranged in the handles of the doors and making it possible to detect that an individual is approaching his hand from a handle or operate it.
- the means 1 and the badge 2 synchronize their shift registers 7 and 13, for example by implementing the sequence of exchanges which is described below in detail, then the means 1 emit an RF interrogation signal.
- This RF interrogation signal is a signal modulated by the means 6, which for example use a two-phase NRZ modulation. he carries the pseudo-random code stored in register 7, mixed with a "challenge" code (key code) which is chosen by the management unit 5 among several possibilities and who will have to determine the answer that will have to give the badge 2.
- the unit of management 11 then receives means 14 the key code carried by the RF signal transmitted to badge 2.
- the correlation is maximum when the RF signal is received by antenna 9 substantially concomitantly with its emission by antenna 3. However, it is minimal as soon as it is no longer the case and by consequently as soon as delays are introduced in the chain of transmission, which is necessarily the case when means of intermediate transmission / reception are interposed by bad people between the vehicle and the user.
- the correlation value varies, depending on the phase shift between the pseudo-random code carried by the received signal and the shift register pseudo-random code 13, which is illustrated in figure 2. It takes its maximum value when the two codes are perfectly synchronized and becomes minimal for time shifts of at least one bit period. For shifts less than a bit period, it varies linearly between its maximum value and its minimum value.
- the pseudo-random code can be coded on 127 bits, while shift registers 7 and 13 are traversed at a clock frequency of 5 MHz, which corresponds to bit periods of 200 ns.
- Correlations are then obtained within ⁇ 30 m of the vehicle, (or then at 7, 62 km ⁇ 30 m or 15, 24 km ⁇ 30 m, etc.).
- This secret code is a code that said vehicle V expects to receive and which is a function of the key code transmitted by the vehicle V.
- This secret code is then mixed with the pseudo-random code of the shift register 13, then the signal obtained is modulated by means 10 and transmitted by the antenna 9.
- this RF signal When this RF signal is received by the antenna 3, it is demodulated, then mixed with the pseudo-random code of the shift register 7.
- the secret code is then retrieved by the management unit 5, if there is correlation between the pseudo-random code carried by said RF signal. To the reception of this secret code, the management unit 5 verifies that it is indeed the expected code and controls unlocking of the doors if this is the case.
- the secret code issued by badge 2 may not be a code mixed with a pseudo-random code, but be constituted by a code pseudo-random specific to badge 2, which therefore carries intrinsically the signature of it.
- the means 1 then include means, synchronized on badge 2, capable of despreading the signal received with this pseudo-random code.
- the vehicle When the presence of an individual near the vehicle is detected, the vehicle emits an activation signal intended to wake up the badge 2.
- the badge 2 Upon receipt of this activation signal, the badge 2 emits an RF signal which carries an identification code mixed with a short pseudo-random signal ("short" to be heard as opposed to the long pseudo-random signal, in this case 127 bits, used after the synchronization step).
- short to be heard as opposed to the long pseudo-random signal, in this case 127 bits, used after the synchronization step.
- the identification code is used to prevent other vehicles that the person concerned does not respond when the badge 2 is activated. repeated over a period sufficient for the means 1 transmission / reception of the vehicle V are synchronized on the pseudo-random signal.
- the transmission / reception means 1 transmit a response signal which marks the end of the initialization sequence. As long as this vehicle response is not received by badge 2, it repeats the emission of the signal which carries the identification code mixed with a signal short pseudo-random.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Lock And Its Accessories (AREA)
Description
La présente invention est relative aux systèmes sécurisés pour la commande du déverrouillage d'au moins un ouvrant de véhicule automobile.The present invention relates to secure systems for control for unlocking at least one vehicle leaf automobile.
Dans les systèmes de commande à distance actuellement utilisés pour le déverrouillage de portières de véhicules automobiles, l'utilisateur doit actionner manuellement sa télécommande (dispositif d'émission/réception intégré à la partie de préhension de sa clé mécanique) pour actionner le déverrouillage des portières.In currently used remote control systems for unlocking doors of motor vehicles, the user must manually operate its remote control (device transmission / reception integrated into the grip part of its mechanical key) to activate the door unlocking.
Or, pour un plus grand confort de l'utilisateur, on souhaite supprimer ce type de manipulations.However, for greater user comfort, we want to remove this type of manipulation.
Il a récemment été proposé des systèmes dits "mains libres" dans lesquels l'utilisateur porte un transpondeur qui est par exemple intégré à un badge.Recently, so-called "hands-free" systems have been proposed in which the user carries a transponder which is for example integrated into a badge.
A réception d'un signal d'interrogation radio-fréquence émis à partir du véhicule, le transpondeur émet de lui-même en réponse un signal d'identification radio-fréquence. Lorsque ce signal est reçu et identifié par des moyens prévus à cet effet sur le véhicule, ces moyens commandent le déverrouillage de l'ouvrant.Upon receipt of a radio frequency interrogation signal from of the vehicle, the transponder emits a signal by itself in response radio frequency identification. When this signal is received and identified by means provided for this purpose on the vehicle, these means control the unlocking the sash.
Un tel système est totalement transparent pour l'utilisateur, puisque le déverrouillage des portières est commandé sans que l'utilisateur n'ait à effectuer d'autres opérations que celle consistant pour lui à manipuler la poignée de sa portière.Such a system is completely transparent to the user, since the unlocking of the doors is controlled without the user having to perform operations other than that consisting in handling the door handle.
De tels systèmes "mains libres" posent toutefois des problèmes de sécurité.However, such "hands-free" systems pose problems of security.
Notamment, certaines personnes « mal intentionnées » peuvent copier le signal d'interrogation émis à partir du véhicule pour le ré- émettre à proximité du transpondeur, alors même que l'utilisateur porteur de ce transpondeur se trouverait dans un lieu éloigné du véhicule. En disposant de moyens adéquats à proximité de l'utilisateur, ils mémorisent le signal d'identification émis en réponse par le transpondeur et ré-émettent ce signal au voisinage du véhicule pour obtenir le déverrouillage des portières de celui-ci.In particular, some “malicious” people may copy the interrogation signal sent from the vehicle to re-transmit it to proximity to the transponder, even when the user carrying this transponder would be in a place far from the vehicle. By having adequate means near the user, they memorize the signal identification issued in response by the transponder and re-emit this signal in the vicinity of the vehicle to obtain the unlocking of the doors of this one.
Un but de l'invention est de proposer une solution permettant d'empêcher ce type de détournements.An object of the invention is to propose a solution allowing to prevent this type of diversion.
L'invention propose à cet effet un système pour la commande de moyens pour le verrouillage/déverrouillage d'au moins un ouvrant de véhicule, notamment automobile, comportant des moyens d'émission/réception qui sont portés par le véhicule et des moyens d'émission/réception qui sont destinés à être portés par un utilisateur et qui, à réception d'un signal d'interrogation émis par les moyens d'émission/réception du véhicule, sont destinés à émettre un signal de réponse apte à commander l'actionnement du déverrouillage de l'ouvrant, caractérisé en ce que les moyens d'émission/réception sur le véhicule et les moyens d'émission/réception de l'utilisateur comportent chacun des moyens mémoire formant registre à décalage circulaire dans lesquels sont stockés au moins un même code pseudo-aléatoire, les moyens d'émission/réception sur le véhicule comportant des moyens pour émettre un signal d'interrogation qui porte un tel code pseudoaléatoire, les moyens d'émission/réception de l'utilisateur comportant des moyens pour désétaler le signal reçu si le code pseudo-aléatoire porté par ledit signal est synchronisé avec un code pseudo-aléatoire correspondant stocké dans leurs moyens mémoire et comportant en outre des moyens pour émettre en réponse un signal qui porte un code pseudo-aléatoire et qui porte en outre une signature qui est propre auxdits moyens d'émission/réception de l'utilisateur, les moyens d'émission réception sur le véhicule comportant des moyens pour désétaler le signal reçu si le code pseudo-aléatoire porté par ledit signal est synchronisé avec un code pseudo-aléatoire correspondant stocké dans leurs moyens mémoire et pour vérifier si le signal reçu porte la signature des moyens d'émission/réception de l'utilisateur.To this end, the invention provides a system for controlling means for locking / unlocking at least one opening of vehicle, in particular automobile, comprising means transmission / reception which are carried by the vehicle and means transmission / reception which are intended to be worn by a user and which, upon receipt of an interrogation signal emitted by the means emission / reception of the vehicle, are intended to emit a signal of response capable of controlling the actuation of the unlocking of the opening, characterized in that the transmission / reception means on the vehicle and the user transmission / reception means each comprise means memory forming circular shift register in which are stored at least one pseudo-random code, the transmission / reception means on the vehicle comprising means for transmitting a signal of interrogation which carries such a pseudo-random code, the means transmission / reception of the user comprising means for despreading the signal received if the pseudo-random code carried by said signal is synchronized with a corresponding pseudo-random code stored in their memory means and further comprising means for transmitting in responds to a signal which carries a pseudo-random code and which further carries a signature which is specific to said means of transmission / reception of the user, the transmission means reception on the vehicle comprising means for despreading the received signal if the pseudo-random code carried by said signal is synchronized with a corresponding pseudo-random code stored in their memory means and to check if the received signal carries the signature of the user's transmission / reception means.
D'autres caractéristiques et avantages de l'invention ressortiront encore de la description qui suit qui est purement illustrative et non limitative et qui doit être lue en regard des dessins annexés sur lesquels :
- la figure 1 est une représentation synoptique illustrant un système conforme à l'invention ;
- la figure 2 illustre la fonction de corrélation des codes pseudo-aléatoires cycliquement permutés sur eux-mêmes, utilisés dans un système du type de celui de la figure 1.
- Figure 1 is a block diagram illustrating a system according to the invention;
- FIG. 2 illustrates the correlation function of the pseudo-random codes cyclically permuted on themselves, used in a system of the type of that of FIG. 1.
On a représenté sur la figure 1 un véhicule V qui porte des moyens 1
d'émission/réception RF destinés à échanger avec un module 2
d'émission/réception RF porté par un utilisateur et se présentant par
exemple sous la forme d'un badge.FIG. 1 shows a vehicle V which carries means 1
RF transmission / reception intended to exchange with a
Les moyens 1 d'émission/réception comportent une antenne 3
disposée par exemple à proximité d'une poignée de portière du véhicule, ou
dans celle-ci, une unité de gestion 5, ainsi que des moyens 4 de conversion
de signal interposés entre l'antenne 3 et l'unité de gestion 5.The transmission / reception means 1 comprise an
Les moyens 4 de conversion de signal comportent en particulier des
moyens 6 pour moduler ou démoduler un signal RF émis ou reçu par
l'antenne 3, un registre à décalage circulaire 7 dans lequel est stocké un
code pseudo-aléatoire, ainsi que des moyens mélangeurs 8 qui sont
montés entre l'unité de gestion 5 et lesdits moyens 6 de
modulation/démodulation et qui sont aptes à mélanger le code pseudo-aléatoire
avec le signal démodulé par les moyens 6 ou avec un signal
transmis par l'unité de gestion 5. Le code pseudo-aléatoire du registre à
décalage circulaire 7 est cycliquement permuté sur lui-même à une certaine
fréquence d'horloge.The signal conversion means 4 include in
Le badge 2 comporte quant à lui une antenne 9, une unité de gestion
11 et des moyens 10 de conversion de signal interposés entre l'antenne 9 et
l'unité de gestion 11.The
Les moyens 10 de conversion de signal comportent, de la même
façon que les moyens 4, des moyens 12 pour moduler ou démoduler un
signal RF émis ou reçu par l'antenne 9, un registre à décalage circulaire 13
dans lequel est stocké un code pseudo-aléatoire identique à celui stocké
dans le registre 7, ainsi que des moyens mélangeurs 14 qui sont montés
entre l'unité de gestion 11 et lesdits moyens 12 de modulation/démodulation
et qui sont aptes à mélanger le code pseudo-aléatoire avec le signal
démodulé par les moyens 12 ou avec un signal transmis par l'unité de
gestion 11. Le code pseudo-aléatoire du registre à décalage circulaire 13
est cycliquement permuté sur lui-même à la même fréquence d'horloge que
celle du registre à décalage 7.The signal conversion means 10 also include
way that means 4, means 12 for modulating or demodulating a
RF signal transmitted or received by the
Le véhicule V comporte des moyens destinés à permettre de détecter la présence d'un individu à proximité du véhicule. Ces moyens sont par exemple constitués de capteurs disposés dans les poignées des portières et permettant de détecter qu'un individu approche sa main d'une poignée ou actionne celle-ci.Vehicle V includes means for enabling detect the presence of an individual near the vehicle. These means are for example made up of sensors arranged in the handles of the doors and making it possible to detect that an individual is approaching his hand from a handle or operate it.
Lorsque la présence d'un individu à proximité du véhicule est
détectée par ces moyens, les moyens 1 et le badge 2 synchronisent leurs
registres à décalage 7 et 13, par exemple en mettant en oeuvre la séquence
d'échanges qui est décrite plus loin de façon détaillée, puis les moyens 1
émettent un signal RF d'interrogation.When the presence of an individual near the vehicle is
detected by these means, the
Ce signal RF d'interrogation est un signal modulé par les moyens 6,
lesquels mettent par exemple en oeuvre une modulation NRZ bi-phase. Il
porte le code pseudo-aléatoire mémorisé dans le registre 7, mélangé avec
un code de "challenge" (code clé) qui est choisi par l'unité de gestion 5
parmi plusieurs possibilités et qui devra déterminer la réponse que devra
donner le badge 2.This RF interrogation signal is a signal modulated by the
A la réception de ce signal par l'antenne 9 du badge 2, il est
démodulé en sens inverse par les moyens 12, puis mélangé au code
pseudo-aléatoire du registre 13 par les moyens 14.Upon receipt of this signal by the
S'il y a corrélation entre les deux codes pseudo-aléatoires, l'unité de
gestion 11 reçoit alors des moyens 14 le code clé porté par le signal RF
transmis au badge 2.If there is a correlation between the two pseudo-random codes, the unit of
On notera que la corrélation est maximale lorsque le signal RF est
reçu par l'antenne 9 sensiblement concomitamment à son émission par
l'antenne 3. Par contre, elle est minimale dés que ce n'est plus le cas et par
conséquent dés que des retards sont introduits dans la chaíne de
transmission, ce qui est nécessairement le cas lorsque des moyens
d'émission/réception intermédiaires sont interposés par des personnes mal
intentionnées entre le véhicule et l'utilisateur. Note that the correlation is maximum when the RF signal is
received by
Plus exactement, la valeur de corrélation varie, en fonction du
déphasage entre le code pseudo-aléatoire porté par le signal reçu et le
code pseudo-aléatoire du registre à décalage 13, de la façon qui est
illustrée sur la figure 2. Elle prend sa valeur maximale lorsque les deux
codes sont parfaitement synchronisés et devient minimale pour des
décalages temporels d'au moins une période de bit. Pour des décalages
temporels inférieurs à une période de bit, elle varie linéairement entre sa
valeur maximale et sa valeur minimale.More precisely, the correlation value varies, depending on the
phase shift between the pseudo-random code carried by the received signal and the
shift register
Ainsi , il y a sensiblement corrélation entre les deux codes pseudo-aléatoires,
tant que le code reçu est décalé dans le temps de moins d'une
demi-période de bit par rapport au code du registre à décalage 13 du badge
2.Thus, there is a significant correlation between the two pseudo-random codes,
as long as the received code is time-shifted by less than one
half bit period relative to the code of the
A titre d'exemple, le code pseudo-aléatoire peut être codé sur 127
bits, tandis que les registres à décalage 7 et 13 sont parcourus à une
fréquence d'horloge de 5 MHz, ce qui correspond à des périodes de bit de
200 ns.For example, the pseudo-random code can be coded on 127
bits, while
Des corrélations sont alors obtenues à ± 30 m du véhicule, (ou ensuite à 7, 62 km ± 30 m ou 15, 24 km ± 30 m, etc.).Correlations are then obtained within ± 30 m of the vehicle, (or then at 7, 62 km ± 30 m or 15, 24 km ± 30 m, etc.).
Une fois le code clé récupéré, l'unité de gestion 11 détermine un
code secret à émettre en sens inverse. Ce code secret est un code que ledit
véhicule V s'attend à recevoir et qui est fonction du code clé transmis par le
véhicule V.Once the key code has been recovered, the
Ce code secret est ensuite mélangé au code pseudo-aléatoire du
registre à décalage 13, puis le signal obtenu est modulé par les moyens 10
et émis par l'antenne 9.This secret code is then mixed with the pseudo-random code of the
A la réception de ce signal RF par l'antenne 3, celui-ci est démodulé ,
puis mélangé au code pseudo-aléatoire du registre à décalage 7.When this RF signal is received by the
Le code secret est alors récupéré par l'unité de gestion 5, s'il y a
corrélation entre le code pseudo-aléatoire porté par ledit signal RF. A la
réception de ce code secret, l'unité de gestion 5 vérifie qu'il s'agit bien du
code attendu et commande le déverrouillage des portières si c'est le cas.The secret code is then retrieved by the
Par contre, lorsqu'il n'y a pas corrélation - ce qui sera le cas si des
moyens d'émission intermédiaires sont introduits dans la chaine de
transmission entre le badge 2 et le véhicule V, puisque ces moyens
intermédiaires introduiront un certain retard entre le code pseudo-aléatoire
porté par le signal RF et celui qui est cycliquement permuté sur lui-même
dans le registre à décalage 7 - , l'unité de gestion 5 maintient le verrouillage
des portières du véhicule.On the other hand, when there is no correlation - which will be the case if
intermediate transmission means are introduced into the chain of
transmission between
Comme on l'aura compris, un système du type de celui qui vient
d'être décrit empêche tout détournement par des personnes mal
intentionnées qui viendraient s'interposer dans la chaíne de transmission
entre le badge et le véhicule. Il empêche également qu'une simple ré-émission
du code pseudo-aléatoire émis par le véhicule suffise à
déclencher le déverrouillage des portières, puisqu'il nécessite que le
véhicule reçoive une réponse qui porte la signature du badge 2. Le fait que
la réponse fournie par le badge soit fonction d'un code clé transmis par le
véhicule assure un niveau de sécurité supplémentaire.As we will have understood, a system of the type which comes
being described prevents misappropriation by evil people
intentioned who would come to intervene in the chain of transmission
between the badge and the vehicle. It also prevents a simple re-emission
pseudo-random code issued by the vehicle is sufficient to
trigger the unlocking of the doors, since it requires that the
vehicle receives a response bearing the signature of
D'autres variantes que celle qui vient d'être décrite sont bien entendu envisageables.Other variants than the one just described are of course conceivable.
En particulier, lorsqu'on utilise un code clé au niveau du véhicule,
celui-ci peut ne pas être mélangé au code pseudo-aléatoire mais être
constitué par un code pseudo-aléatoire choisi parmi plusieurs possibles. De
même, le code secret émis par le badge 2 peut ne pas être un code
mélangé à un code pseudo-aléatoire, mais être constitué par un code
pseudo-aléatoire propre au badge 2, qui porte par conséquent
intrinsèquement la signature de celui-ci. Les moyens 1 comportent alors des
moyens, synchronisés sur le badge 2, aptes à désétaler le signal reçu avec
ce code pseudo-aléatoire.In particular, when using a key code at vehicle level,
this can not be mixed with the pseudo-random code but can be
consisting of a pseudo-random code chosen from among several possible. Of
even, the secret code issued by
Par ailleurs, une séquence possible pour la synchronisation entre
des registres à décalage des moyens 1 et du badge 2 peut être la suivante.In addition, a possible sequence for synchronization between
shift registers of the
Lorsque la présence d'un individu à proximité du véhicule est
détectée, le véhicule émet un signal d'activation destiné à réveiller le badge
2.When the presence of an individual near the vehicle is
detected, the vehicle emits an activation signal intended to wake up the
A la réception de ce signal d'activation, le badge 2 émet un signal RF
qui porte un code d'identification mélangé à un signal pseudo-aléatoire court
("court" devant être entendu par opposition au signal pseudo-aléatoire long,
en l'occurrence de 127 bits, utilisé après l'étape de synchronisation).Upon receipt of this activation signal, the
Le code d'identification est utilisé pour éviter que d'autres véhicules
que celui concerné ne répondent lors de l'activation du badge 2. Il est
répété sur une période suffisante pour que les moyens 1
d'émission/réception du véhicule V se synchronisent sur le signal pseudo-aléatoire.The identification code is used to prevent other vehicles
that the person concerned does not respond when the
Lorsque c'est le cas, les moyens d'émission/réception 1 émettent un
signal de réponse qui marque la fin de la séquence d'initialisation. Tant que
cette réponse du véhicule n'est pas reçue par le badge 2, celui-ci répète
l'émission du signal qui porte le code d'identification mélangé à un signal
pseudo-aléatoire court.When this is the case, the transmission / reception means 1 transmit a
response signal which marks the end of the initialization sequence. As long as
this vehicle response is not received by
Claims (11)
- System for the control of means for locking/unlocking at least one openable panel of a vehicle, in particular an automobile, comprising transmission/reception means (3, 4, 5) and memory means (7) which are carried by the vehicle and transmission/reception means (9, 10, 11) and memory means (13) which are intended to be carried by a user, the transmission/reception means of the vehicle (3, 4, 5) forming a circular shift register in which is stored a pseudo-random code and comprising means (3, 6, 7) for transmitting an interrogation signal which carries such a pseudo-random code, the transmission/reception means of the user (9, 10, 11) comprising means (12, 13, 14) for de-spreading the signal received if the pseudo-random code carried by the said signal is synchronized with a corresponding pseudo-random code stored in their memory means (13) and being intended to transmit a response signal able to control the actuation of the unlocking of the openable panel,
characterized in that
the memory means (13) and the transmission/reception means (9, 10, 11) of the user form a circular shift register and furthermore comprise means (9, 12, 13, 14) for transmitting a signal in response which signal carries a pseudo-random code and a signature which is specific to the said transmission/reception means (9, 10, 11) of the user, the transmission/reception means (3, 4, 5) on the vehicle comprising means (6, 7, 8) for de-spreading the signal received if the pseudo-random code carried by the said response signal is synchronized with a corresponding pseudo-random code stored in their memory means (7) and for verifying whether the signal received carries the signature of the transmission means. - System according to Claim 1, characterized in that the interrogation signal transmitted by the transmission/reception means of the vehicle (3, 4, 5) comprises a key code, the response signal transmitted by the transmission/reception means (9, 10, 11) of the user comprising a secret code determined by the said transmission/reception means of the user as a function of the said key code.
- System according to Claim 2, characterized in that the transmission/reception means (3, 4, 5) of the vehicle comprise means (8) for mixing the said key code with the pseudo-random code within the interrogation signal.
- System according to Claim 2, characterized in that the transmission/reception means (9, 10, 11) of the user comprise means (13) for mixing the said secret code with the pseudo-random code within the response signal.
- System according to Claim 2, characterized in that the key code and/or the secret code constitutes (constitute) the pseudo-random code of the interrogation signal or response signal.
- System according to Claim 1, characterized in that the signature of the transmission/reception means (9, 10, 11) of the user consists of the pseudo-random code of the response signal.
- System according to one of the preceding claims, characterized in that it comprises means for synchronizing the various memory means, prior to the transmission of the interrogation signal.
- System according to Claim 7, characterized in that the transmission/reception means (3, 4, 5) of the vehicle comprise means for self-synchronizing with a pseudo-random code transmitted by the transmission/reception means of the user upon their activation.
- System according to Claim 8, characterized in that this pseudo-random code is a shorter code than the pseudo-random code or codes used by the transmission/reception means of the vehicle and of the user after synchronization.
- System according to Claim 9, characterized in that the pseudo-random code or codes used by the transmission/reception means of the vehicle and of the user after synchronization are 127-bit codes.
- System according to one of the preceding claims, characterized in that the interrogation signals and response signals are RF signals modulated by a two-phase NRZ modulation.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9913807A FR2800783B1 (en) | 1999-11-04 | 1999-11-04 | IMPROVEMENTS TO SAFETY SYSTEMS FOR CONTROLLING THE RELEASE OF AT LEAST ONE MOTOR VEHICLE OPENING Sash |
| FR9913807 | 1999-11-04 | ||
| PCT/FR2000/003065 WO2001033015A1 (en) | 1999-11-04 | 2000-11-03 | Secure system for controlling the unlocking of at least one motor vehicle opening panel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1144784A1 EP1144784A1 (en) | 2001-10-17 |
| EP1144784B1 true EP1144784B1 (en) | 2004-04-21 |
Family
ID=9551711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00974644A Expired - Lifetime EP1144784B1 (en) | 1999-11-04 | 2000-11-03 | Secure system for controlling the unlocking of at least one motor vehicle opening panel |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US7227448B2 (en) |
| EP (1) | EP1144784B1 (en) |
| JP (1) | JP2003514150A (en) |
| DE (1) | DE60010039T2 (en) |
| FR (1) | FR2800783B1 (en) |
| WO (1) | WO2001033015A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060178110A1 (en) * | 2005-02-09 | 2006-08-10 | Nokia Corporation | System and method for interacting with an entity by means of a mobile station via a user-wearable terminal |
| JP2009166550A (en) * | 2008-01-11 | 2009-07-30 | Mitsubishi Electric Corp | On-vehicle equipment remote control system and on-vehicle equipment remote control method |
| KR102179096B1 (en) * | 2014-12-16 | 2020-11-16 | 현대자동차주식회사 | Method and apparatus for connecting wireless communication using randomcode in vechile |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1595797A (en) * | 1978-04-21 | 1981-08-19 | Pushman Hugh John | Security systems |
| US5367572A (en) * | 1984-11-30 | 1994-11-22 | Weiss Kenneth P | Method and apparatus for personal identification |
| FR2628471A1 (en) * | 1988-03-09 | 1989-09-15 | Werke Gestion Securit | Electronically operated door lock - includes transmitter in lock interrogating key circuit before releasing mechanism |
| JPH0732499B2 (en) * | 1988-08-16 | 1995-04-10 | 日産自動車株式会社 | Lock and unlock control system |
| IT1249903B (en) * | 1991-06-07 | 1995-03-30 | Trw Sipea Spa | OPTIMIZED SECURITY REMOTE CONTROL |
| JP2561232B2 (en) * | 1992-08-31 | 1996-12-04 | 双葉電子工業株式会社 | Spectrum spread receiver and spectrum spread transmitter / receiver using this device |
| US5369706A (en) * | 1993-11-05 | 1994-11-29 | United Technologies Automotive, Inc. | Resynchronizing transmitters to receivers for secure vehicle entry using cryptography or rolling code |
| US5420925A (en) * | 1994-03-03 | 1995-05-30 | Lectron Products, Inc. | Rolling code encryption process for remote keyless entry system |
| US5736935A (en) * | 1995-03-14 | 1998-04-07 | Trw Inc. | Keyless vehicle entry and engine starting system |
| US6057779A (en) * | 1997-08-14 | 2000-05-02 | Micron Technology, Inc. | Method of controlling access to a movable container and to a compartment of a vehicle, and a secure cargo transportation system |
-
1999
- 1999-11-04 FR FR9913807A patent/FR2800783B1/en not_active Expired - Fee Related
-
2000
- 2000-11-03 WO PCT/FR2000/003065 patent/WO2001033015A1/en active IP Right Grant
- 2000-11-03 DE DE60010039T patent/DE60010039T2/en not_active Expired - Lifetime
- 2000-11-03 EP EP00974644A patent/EP1144784B1/en not_active Expired - Lifetime
- 2000-11-03 JP JP2001535684A patent/JP2003514150A/en active Pending
-
2001
- 2001-06-20 US US09/883,963 patent/US7227448B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2003514150A (en) | 2003-04-15 |
| EP1144784A1 (en) | 2001-10-17 |
| DE60010039D1 (en) | 2004-05-27 |
| FR2800783A1 (en) | 2001-05-11 |
| FR2800783B1 (en) | 2002-02-22 |
| US20020163420A1 (en) | 2002-11-07 |
| US7227448B2 (en) | 2007-06-05 |
| WO2001033015A1 (en) | 2001-05-10 |
| DE60010039T2 (en) | 2004-10-21 |
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