EP0155378B1 - Coding method for an electronic key - Google Patents
Coding method for an electronic key Download PDFInfo
- Publication number
- EP0155378B1 EP0155378B1 EP84115152A EP84115152A EP0155378B1 EP 0155378 B1 EP0155378 B1 EP 0155378B1 EP 84115152 A EP84115152 A EP 84115152A EP 84115152 A EP84115152 A EP 84115152A EP 0155378 B1 EP0155378 B1 EP 0155378B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- code
- transmitter
- receiver
- electronic key
- reset
- 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.)
- Expired
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
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00182—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional data transmission between data carrier and locks
- G07C2009/00238—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional data transmission between data carrier and locks the transmittted data signal containing a code which is changed
- G07C2009/00253—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional data transmission between data carrier and locks the transmittted data signal containing a code which is changed dynamically, e.g. variable code - rolling code
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C2009/00753—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys
- G07C2009/00769—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means
- G07C2009/00785—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means by light
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C2209/00—Indexing scheme relating to groups G07C9/00 - G07C9/38
- G07C2209/06—Involving synchronization or resynchronization between transmitter and receiver; reordering of codes
Definitions
- Such a method is known from DE-A-3234538 and DE-A-3234539.
- a number of code numbers are stored in the transmitter and receiver, a new matching code number being set automatically in the transmitter and receiver after each transmission and reception operation, which can be done continuously or using a random number generator.
- a reset code is sent in the known method. This opens immediately or after the next key press.
- the reset code represents a security loophole, since unauthorized copying enables an unauthorized user to open the lock with the help of the reset code.
- the object of the invention is therefore to further develop the method of the type specified in the introduction in such a way that unauthorized opening is prevented with the aid of the reset code.
- auxiliary key preferably a recessed «pencil key» (micro key that can only be actuated with a specific pen) and with the transmitter switched on.
- the electronic key can be designed in such a way that the typed-in number is deleted again after a few sending operations of the reset code, so that unauthorized use is further complicated.
- the electronic key can be provided with a «repeat block», i.e. if a number is entered incorrectly, the typing of a new number is blocked for a certain time.
Description
Die Erfindung betrifft ein Verfahren zur Code-Sicherung bei einem elektronischen Schlüssel, insbesondere für Kraftfahrzeuge mit eingebauter Zentralverriegelung, der aus einem Sender besteht, welcher ein codiertes Infrarot-Signal aussendet, das von einem auf den Code abgestimmten Empfänger aufgenommen wird, wobei der Code des Signals bei Sender und Empfänger automatisch verstellbar ist, und bei dem der Sender nach Desynchronisatiotv-cyder Batteriewechsel im Sender bzw. Empfänger einen Reset-Code sendet.The invention relates to a method for code security in an electronic key, in particular for motor vehicles with a built-in central locking system, which consists of a transmitter which emits a coded infrared signal which is received by a receiver matched to the code, the code of signal at the transmitter and receiver can be adjusted automatically, and in which the transmitter according to Desynchronisatiotv c-y of the battery change in the transmitter or receiver transmits a reset code.
Ein derartiges Verfahren ist aus der DE-A-3234538 und DE-A-3234539 bekannt. Dabei sind im Sender und Empfänger eine Anzahl von CodeNummern gespeichert, wobei nach jedem Sende-und Empfangsvorgang im Sender und Empfänger eine neue übereinstimmende Code-Nummer selbsttätig eingestellt wird, was fortlaufend oder unter Verwendung eines Zufallsgenerators geschehen kann. Dadurch wird aus einer grossen Anzahl von Möglichkeiten, bei beispielsweise 24 Bits 224 = 16 Mio., ein beliebiges Bitmuster ausgewählt, so dass ein unrechtmässiger Gebrauch eines codierten Codes, beispielsweise durch Kopieren, praktisch ausgeschlossen ist.Such a method is known from DE-A-3234538 and DE-A-3234539. A number of code numbers are stored in the transmitter and receiver, a new matching code number being set automatically in the transmitter and receiver after each transmission and reception operation, which can be done continuously or using a random number generator. As a result, an arbitrary bit pattern is selected from a large number of possibilities, for example 24 bits 2 24 = 16 million, so that illegal use of a coded code, for example by copying, is practically impossible.
Um dabei auch nach Batteriewechsel im Sender (Batterie im Schlüssel) bzw. Empfänger (Kraftfahrzeugakkumulator) oder nach Desynchronisation (Code befindet sich ausserhalb des Fangbereichs) das Schloss öffnen zu können, wird bei dem bekannten Verfahren ein Reset-Code gesendet. Dieser öffnet sofort oder nach dem nächsten Tastendruck. Der Reset-Code-stellt eine Sicherheitslücke dar, da bei einem unberechtigten Kopieren ein unbefugter Benutzer in die Lage versetzt wird, das Schloss mit Hilfe des Reset-Codes zu öffnen.In order to be able to open the lock even after changing the battery in the transmitter (battery in the key) or receiver (motor vehicle accumulator) or after desynchronization (code is outside the capture range), a reset code is sent in the known method. This opens immediately or after the next key press. The reset code represents a security loophole, since unauthorized copying enables an unauthorized user to open the lock with the help of the reset code.
Aufgabe der Erfindung ist es daher, das Verfahren der eingangs angegebenen Art derart weiterzubilden, dass das unberechtigte Öffnen mit Hilfe des Reset-Codes verhindert wird.The object of the invention is therefore to further develop the method of the type specified in the introduction in such a way that unauthorized opening is prevented with the aid of the reset code.
Diese Aufgabe wird erfindungsgemäss dadurch gelöst, dass der Reset-Code durch Eintippen einer Binärzahl aktiviert wird.This object is achieved according to the invention in that the reset code is activated by typing in a binary number.
Damit wird der Vorteil erzielt, dass der Reset-Code nur nach Eintippen einer Binärzahl (z. B. 8 bis 16 Bit) in den Sender aktiviert wird, womit eine unbefugte Benutzung des elektronischen Schlüssels praktisch ausgeschlossen wird.This has the advantage that the reset code is only activated after a binary number (e.g. 8 to 16 bits) has been typed into the transmitter, which practically precludes unauthorized use of the electronic key.
Vorteilhaft erfolgt das Eingeben in einem Morse-Code über eine Hilfstaste, vorzugsweise eine versenkt angeordnete «Bleistifttaste» (Mikrotaste, die nur mit einem bestimmten Stift betätigt werden kann) und bei eingeschaltetem Sender.The entry in a Morse code advantageously takes place via an auxiliary key, preferably a recessed «pencil key» (micro key that can only be actuated with a specific pen) and with the transmitter switched on.
Der elektronische Schlüssel kann so ausgebildet sein, dass die eingetippte Zahl nach einigen Sendevorgängen des Reset-Codes wieder gelöscht wird, so dass ein unbefugtes Benutzen weiter erschwert wird.The electronic key can be designed in such a way that the typed-in number is deleted again after a few sending operations of the reset code, so that unauthorized use is further complicated.
Ferner kann der elektronische Schlüssel mit einer «Wiederholungssperre» versehen sein, d.h. bei einer falsch eingegebenen Zahl wird das Eintippen einer neuen Zahl eine bestimmte Zeit blokkiert.Furthermore, the electronic key can be provided with a «repeat block», i.e. if a number is entered incorrectly, the typing of a new number is blocked for a certain time.
Claims (4)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19843407469 DE3407469A1 (en) | 1984-02-29 | 1984-02-29 | METHOD FOR SECURING THE CODE OF AN ELECTRONIC KEY |
DE3407469 | 1984-02-29 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0155378A1 EP0155378A1 (en) | 1985-09-25 |
EP0155378B1 true EP0155378B1 (en) | 1988-06-22 |
Family
ID=6229234
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84115152A Expired EP0155378B1 (en) | 1984-02-29 | 1984-12-11 | Coding method for an electronic key |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0155378B1 (en) |
DE (2) | DE3407469A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
US6175312B1 (en) | 1990-05-29 | 2001-01-16 | Microchip Technology Incorporated | Encoder and decoder microchips and remote control devices for secure unidirectional communication |
US6690796B1 (en) | 1995-05-17 | 2004-02-10 | The Chamberlain Group, Inc. | Rolling code security system |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2026498T3 (en) * | 1986-08-12 | 1992-05-01 | Siemens Aktiengesellschaft | ELECTRONIC LOCKING INSTALLATION WITH AT LEAST ONE LOCK ESPECIALLY FOR AUTOMOBILES. |
DE3636822C2 (en) * | 1986-10-29 | 1993-12-23 | Ruf Kg Wilhelm | Electronic remote control device, in particular for central locking systems of motor vehicles |
DE4302550C2 (en) * | 1993-01-29 | 1997-02-20 | Siemens Ag | Vehicle locking system |
US6980655B2 (en) | 2000-01-21 | 2005-12-27 | The Chamberlain Group, Inc. | Rolling code security system |
WO2005043451A2 (en) * | 2003-08-05 | 2005-05-12 | Pedersen Steinar | System for identification of a person |
US8422667B2 (en) | 2005-01-27 | 2013-04-16 | The Chamberlain Group, Inc. | Method and apparatus to facilitate transmission of an encrypted rolling code |
US9148409B2 (en) | 2005-06-30 | 2015-09-29 | The Chamberlain Group, Inc. | Method and apparatus to facilitate message transmission and reception using different transmission characteristics |
US10652743B2 (en) | 2017-12-21 | 2020-05-12 | The Chamberlain Group, Inc. | Security system for a moveable barrier operator |
US11074773B1 (en) | 2018-06-27 | 2021-07-27 | The Chamberlain Group, Inc. | Network-based control of movable barrier operators for autonomous vehicles |
US11423717B2 (en) | 2018-08-01 | 2022-08-23 | The Chamberlain Group Llc | Movable barrier operator and transmitter pairing over a network |
US10997810B2 (en) | 2019-05-16 | 2021-05-04 | The Chamberlain Group, Inc. | In-vehicle transmitter training |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3754164A (en) * | 1971-04-01 | 1973-08-21 | P Zorzy | Electronic combination lock |
FR2420008A1 (en) * | 1978-03-17 | 1979-10-12 | Neiman Sa | MOTOR VEHICLE LOCK CONTROL DEVICE |
DE3225754A1 (en) * | 1982-07-09 | 1984-01-12 | Hülsbeck & Fürst GmbH & Co KG, 5620 Velbert | METHOD FOR THE LOCKING EFFECTIVE INTERACTION OF A KEY-LIKE PART WITH A LOCK-LIKE PART |
-
1984
- 1984-02-29 DE DE19843407469 patent/DE3407469A1/en not_active Withdrawn
- 1984-12-11 DE DE8484115152T patent/DE3472281D1/en not_active Expired
- 1984-12-11 EP EP84115152A patent/EP0155378B1/en not_active Expired
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6175312B1 (en) | 1990-05-29 | 2001-01-16 | Microchip Technology Incorporated | Encoder and decoder microchips and remote control devices for secure unidirectional communication |
US6166650A (en) * | 1991-05-29 | 2000-12-26 | Microchip Technology, Inc. | Secure self learning system |
US6154544A (en) | 1995-05-17 | 2000-11-28 | The Chamberlain Group, Inc. | Rolling code security system |
US6690796B1 (en) | 1995-05-17 | 2004-02-10 | The Chamberlain Group, Inc. | Rolling code security system |
US8194856B2 (en) | 1995-05-17 | 2012-06-05 | The Chamberlain Group, Inc. | Rolling code security system |
US8233625B2 (en) | 1995-05-17 | 2012-07-31 | The Chamberlain Group, Inc. | Rolling code security system |
US8284021B2 (en) | 1995-05-17 | 2012-10-09 | The Chamberlain Group, Inc. | Rolling code security system |
US8633797B2 (en) | 1995-05-17 | 2014-01-21 | 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 |
Also Published As
Publication number | Publication date |
---|---|
DE3472281D1 (en) | 1988-07-28 |
EP0155378A1 (en) | 1985-09-25 |
DE3407469A1 (en) | 1985-09-05 |
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