GB2285702A - Operating vehicles - Google Patents

Operating vehicles Download PDF

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Publication number
GB2285702A
GB2285702A GB9500752A GB9500752A GB2285702A GB 2285702 A GB2285702 A GB 2285702A GB 9500752 A GB9500752 A GB 9500752A GB 9500752 A GB9500752 A GB 9500752A GB 2285702 A GB2285702 A GB 2285702A
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GB
Grant status
Application
Patent type
Prior art keywords
vehicle
user
method
program
processor
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
GB9500752A
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GB2285702B (en )
GB9500752D0 (en )
Inventor
David Irvine
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.)
* IRVINE TECHNOLOGIES Ltd
IRVINE TECHNOLOGIES Ltd
Original Assignee
Irvine Technologies Limited
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

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R25/00Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
    • B60R25/10Fittings or systems for preventing or indicating unauthorised use or theft of vehicles actuating a signalling device
    • B60R25/102Fittings or systems for preventing or indicating unauthorised use or theft of vehicles actuating a signalling device a signal being sent to a remote location, e.g. a radio signal being transmitted to a police station, a security company or the owner
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R25/00Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
    • B60R25/01Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens
    • B60R25/04Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens operating on the propulsion system, e.g. engine or drive motor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R25/00Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
    • B60R25/10Fittings or systems for preventing or indicating unauthorised use or theft of vehicles actuating a signalling device
    • B60R25/1003Alarm systems characterised by arm or disarm features
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R25/00Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
    • B60R25/20Means to switch the anti-theft system on or off
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R25/00Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
    • B60R25/20Means to switch the anti-theft system on or off
    • B60R25/23Means to switch the anti-theft system on or off using manual input of alphanumerical codes

Abstract

A method of operating a vehicle with a management system including a processor for controlling the vehicle comprises holding a program in encoded form in a first store and on starting the vehicle decoding the program in accordance with a PIN entered and reading it to processor memory. Further programs held in the first store validate the decoded program, and energise alarms if attempts are made to start the vehicle without a PIN, if the decoded program is invalid or in response to outputs from alarm condition sensors. A forgotten or lost PIN can be given to a user using a processor connected to the telephone system and running a database storing user passwords, telephone numbers, vehicle serial numbers, and status flags; which, when an user dials in and gives his password, prompts entry of the serial number which is used determine the PIN, the user then terminates the call and the processor dials the stored telephone number and repeats the PIN (unless the status flag indicates vehicle stolen in which case the authorities are notified and the call traced).

Description

OPERATING VEHICLES DESCRIPTION The invention relates to operating vehicles, in particular to methods and apparatus for operating vehicles having vehicle management systems including a processor programmable to effect control of the vehicle's engine.

The methods and apparatus herein described are particularly useful in preventing the theft of vehicles.

The frequency at which vehicles are stolen in this and other countries increases year by year.

Current vehicle theft security systems fall into two classes. The first physically immobilises the vehicle and mechanically prevents movement of the steering wheel, the gear lever, or the operating pedals of the vehicle.

The second includes a variety of electrical or electronic systems which. when armed, sense access to, or motion of, the vehicle and are operable to sound an alarm and, possibly, disable part of the electrical power circuit for the vehicle.

Both of these types of system, in widespread use today, appear to be well known to criminals and it is an unfortunate aspect of each of them that they can readily be circumvented by a skilled individual.

An object of the invention is to provide a method and apparatus which will allow a vehicle to be operated only by an authorised user.

In one aspect the invention provides a method of operating a vehicle having an vehicle management system which includes a processor programmable to effect control of the vehicle, the method comprising the steps of holding an vehicle management program for the processor in a permanent, encoded, form in first a store and, when it is desired to operate the vehicle, reading that program from said first store to memory associated with the processor whilst decoding that program in accordance with the content of a second store.

The method may include the step of holding a decoding algorithm permanently in said second store and providing that said second store is a device removable from the vehicle.

The method may further include the step of providing said second store as a register normally set to ZERO and inputting to that store data which is held therein and used to decode the vehicle management program when it is desired to operate the vehicle.

Desirably, steps are included which provide one or more further programs in said first store for checking and/or validating the decoded program passed to the memory associated with the processor.

Preferably, the method includes the step of providing that the or each said further program energises an alarm if an attempt is made to start the vehicle whilst said register is set to ZERO.

The or each said further program may permit a predetermined plurality of attempts to start the vehicle to be made before an alarm is energised if the vehicle management program in memory associated with the processor is incorrectly decoded.

The or each said further program may also be operable to prevent entry of data to said register for a pre-determined period if the vehicle management program has been incorrectly decoded more than a pre-determined number of times.

Advantageously, said further programs are arranged to prevent operation of said vehicle management program in response to inputs from intruder or other sensors associated with the vehicle.

The or each said further program may energise an alarm if one or more of said sensors associated with the vehicle is enabled.

A second aspect of the invention provides security system for vehicles having an vehicle management system including a processor programmable to effect control of the vehicle, system comprising a first store in which a vehicle management program is permanently held in encoded form and memory associated with the processor to which that program is read, means being provided allowing the program to be decoded as it is read to the memory associated with the processor.

The means allowing the vehicle management vehicle program to be decoded may comprises a device for holding a decoding algorithm and which is physically separable from the vehicle when the vehicle is not in use, or, preferably, a register to which data is input by a user.

Data may be input to said register, by a locking mechanism actuable by a key held by the authorised user, by an infra red or ultra sonic scanner operable to respond to an infra red or ultra sonic sender actuable by a user, but advantageously, by a keypad by means of which a user may input to said register a sequence of digits.

The system may include allowing a user to input a sequence of digits via said keypad to said register a predetermined number of times before said alarm annunciators are activated.

Desirably delay means are provided preventing entry of a sequence of numbers from said keypad for a predetermined period after said predetermined plurality of attempts to enter the correct sequence of numbers have been made.

Motion and/or intruder sensors are desirably provided and which are actuable to prevent said vehicle management program being transferred to said memory associated with the processor.

One or more alarm annunciators may be provided which are activated if no data is input to said register.

A third aspect of the invention provides a method of enabling the sequence of numbers usable in a vehicle incorporating a security system as the method comprising coupling a central processor including a data base to the telephone system to enable an authorised user to dial thereinto, loading into that data base information relating to user passwords, user telephone numbers, serial numbers associated with the vehicles for which sequences of numbers have been provided, the sequences of numbers for those vehicles and status flags in respect of those vehicles; the information within the data base being organised into two look-up tables the first of which correlates user passwords with user phone numbers and the second of which correlates car serial numbers with the sequence of numbers which must be input thereto to enable operation of the vehicle management system and said status flags, and into a log table into which information relating to user passwords are collated with car serial numbers.

This method may provide that when an authorised user dials into the central location (at which the database is houseaj he is prompted to enter a password and thereafter the serial number associated with the vehicle, a car serial number being then used in the second look-up table to determine the sequence of numbers to be input to the register to enable the vehicle management program to be decoded correctly, the method then further providing that the authorised used is asked to terminate the phone call to enable the central processor to dial the recorded telephone number of the user and repeat to him the sequence of numbers obtained from the look up table.

Desirably, the method further provides that should a status flag in said look-up <RTI>table</RTI> indicate the vehicle has been stolen a telephone call is immediately initiated to an authorised authority.

A fourth aspect of the invention provides apparatus for carrying out the above method comprising a processor, memory associated with the processor, pulse and/or tone decoders, modems and the like coupled to the processor in which there is provided a central data base programmed to carry out the method the apparatus further including a voice digitiser.

The above and other aspects, features and advantages of the invention will become apparent from the following description of embodiments of the invention now made with reference to the accompanying drawings in which: Figure 1 highly schematically illustrates circuitry embodying and vehicle or vehicle management system embodying the invention, Figure 2 is a flow diagram illustrating schematically operation of certain functions of the circuitry illustrated in Figure 1, and Figure 3 illustrates highly schematically a system allowing authorised users a sequence of numbers usable in the system of Figure 1.

A car management system embodying the invention comprises an integrated circuit (IC) 10, various functions of which are shown schematically represented in the Figure as various areas, e.g. at 12 there is indicated a permanent memory <RTI>(ROM)</RTI> which stores three programs usable in the method and apparatus of the present invention.

The first of these programs is a loader or boot program (BPROG) the second is a car management program <RTI>(CXPROG)</RTI> and the third is a validator program (VPROG).

Both <RTI>CXPROG</RTI> and VPROG are stored in encrypted or encoded form.

IC 10 includes a processor (PROC) 14 having associated with it an erasable read/write memory 16 <RTI>(PROCXEX)</RTI> which functions only when power is provided to IC 10. PROC 14 is coupled to components of an vehicle to be managed by via leads 18 and to (passive and/or active) intruder and/or motion sensors (not shown) by leads 20. IC 10 is further coupled to alarm annunciators (e.g. tone sounders and/or lights - not <RTI>shoTTne</RTI> by leads 22.

IC 10 incorporates a register (REG) 24 normally set to ZERO but operable to receive and store a number sent thereto from a keypad 26; and a memory (MEM) 28 holding a number (STORVAL) setable by a user but in the range of 3 to 7. An LED display 30 is energisable by IC 10 to provide indications to a user.

Power to IC 10 is taken from the electrical power system of the vehicle. Control of the vehicle's ignition system is effected by an ignition switch 32 and the condition of this switch is monitored by IC 10.

The operation of certain functions of the vehicle management system shown in Figure 1 will be explained with reference to Figure 2 which is a flow diagram indicative of the way those functions work.

For a user to start a vehicle having a car management system embodying the invention he must enter a number (PIN) via keypad 26 into REG 24. Thereafter the user must close the ignition switch 32 to activate the management system and enable the vehicle to start. Once ignition switch 32 is closed BPROG held in <RTI>ROX</RTI> 12 is operable to check if REG 24 is set to ZERO. If this register is set to ZERO, BPROG causes an output to be passed to lead 22 enabling the alarm annunciators and setting COUNT to ZERO.

If the content of REG 24 is NON-ZERO, BPROG is operable to check that the sensors coupled to IC 10 via leads 20 are disabled. If the sensors are not disabled BPROG is operable to activate the alarm annunciators and set the value of COUNT to ZERO.

If the sensors are disabled BPROG is operable to enable PROC 14 and adds ONE to a count (COUNT) held in that processor. BPROG is then operable to cause <RTI>CMPROG</RTI> to be read from <RTI>ROM</RTI> 12 to <RTI>PROCMEM</RTI> 16 whilst, at the same time, decoding <RTI>CMPROG</RTI> making use of the PIN held in REG 24.

Once <RTI>CMPROG</RTI> has been loaded in <RTI>PROCMEM</RTI> 16 BPROG is operable to compare the value of COUNT in PROC 14 with the value of STORVAL held in <RTI>MEN</RTI> 28.

If COUNT is less than or equal to STORVAL, BPROG is effective to run VPROG which is operable to check the integrity of <RTI>CMPROG</RTI> in PPOCMEM 16. If VPROG <RTI>determines</RTI> that CNPROG is incorrect (for example because an incorrect PIN held in REG 24 has been used to decode the program), BPROG is enabled to erase all data in <RTI>PROCNEX</RTI> 16, re-set REG 24 to ZERO and indicate to a user, via LED display 30, that he should open the ignition switch, re-enter the PIN via keypad 26 and attempt to re-start the vehicle.

If the value of COUNT is greater than that of STORVAL held in MEM 28 then BPROG is operable to activate the alarm annunciators via leads 22 and disable further attempts to energise the management system for a predetermined period (for example five minutes).

If <RTI>CMPROG</RTI> is validated by VPROG the car management system begins to function, REG 24 is reset to ZERO and COUNT is reset to ZERO.

It will be appreciated that various modifications may be <RTI>nade</RTI> to the above described arrangement without departing from the invention. Some of the modifications which may be made are as follows: Rather than providing that a signal is input to REG 24 the register may be implemented as a device separable from IC 10 - as a "plug in" module - which holds the PIN in <RTI>ROX.</RTI>

As described the PIN is entered manually via the keypad, but it will be appreciated that the PIN may be entered via an infra-red or ultrasonic scanning device or in any other suitable way.

It wil] be appreciated that the management system is rendered operable, allowing the vehicle to start, if and only if a PIN has been entered prior to any attempt to energise the engine, only if the sensors for detecting intrusion into or motion of the vehicle have been disabled, only if the correct PIN has been input (enabling proper decoding of the management program) and finally only if the management program is validated.

The provision of a time delay should a number of attempts be made to start the vehicle with an incorrect PIN has the effect of inhibiting electronic cycling of PIN's in an attempt to overcome the protection afforded by the system.

It will be appreciated from the foregoing description that it is necessary for an authorised user to have or know the PIN he must enter for the vehicle is to start.

Clearly if he looses or forgets that number or sequence of digits the will be unable to start the vehicle (despite STORVAL giving him a number of attempts to enter the correct number).

Embodiments of the invention provide method and apparatus by which an authorised user may be given his PIN should he loose or forget it.

A system for effecting this is highly schematically shown in Figure 3 to comprise a processor 50 incorporating a central database. Processor 50 is located at a central station and is coupled to the telephone network by voice digitisers, pulse and tone decoders and/or modems as indicated generally at 52.

In the database information is organised into three look-up tables. The first indicated schematically at 54 holds information identifying user passwords and collates them with information regarding recorded user telephone numbers; the second, indicated at 56 holds information identifying serial numbers provided for each vehicle with the sequence of digits, or PIN usable to activate the management system and with a status flag (normally set to ZERO but otherwise operable to cause the system to alert Police); and the third, an EVENT LOG table holding information identifying user passwords with the car serial numbers and a data logging system.

The PIN recovery system operates in accordance with the schematic flow diagram shown in Figure 4.

Should an authorised user forget or loose his PIN he dials into the system and enters a password (by keying it in on his telephone pad or by using a modem).

The system checks the password and prompts the authorised user to enter (in the same way) the car serial number.

The system then looks at table 54 and identifies (after checking the status flag) from the car serial number the appropriate PIN.

If the status flag indicates that the vehicle has been stolen the system automatically generates an alarm call to the authorities and may arranged be activate a trace on the phone line to see from where the system is being accessed. If the status flag is set ZERO indicates that it is safe to send the PIN number to the caller - the system prompts the caller to hang up his phone.

The system awaits the caller terminating the call and will then (from LOOK-UP table 55 and the users password) identify the users recorded telephone number. It then automatically dials that number and when the call is answered gives the PIN number by digitised voice to the authorised user.

If the line is engaged the system may be arranged to wait a few minutes and try once or twice more before it re-sets and awaits the authorised user calling in again.

It is intended that the PIN recovery service not be available to the general public - but only to registered users. The security - checked registered users would, it is thought, be limited to certain authorised car dealers, motoring organisations such as the AA and RAC, some Police approved locksmiths and the Police themselves.

In the foregoing description it will be appreciated that the invention provides a method and apparatus which will greatly enhance the security of vehicles fitted with a management system than is presently available.

It is envisaged that the system will be fitted by vehicle manufacturers who will operate the PIN recovery service, perhaps at a cost, to those to whom they have sold vehicles.

Other modifications which may be made to the described arrangement may provide that the management system automatically provides, in addition to the sound and/or light annunciation of an intrusion or illegal attempt to start the vehicle, a similar indication by means of a radio link to a remote location.

Various other modifications to the apparatus and method described may be made and which will be apparent to the skilled reader.

Claims (27)

1. A method of operating a vehicle having an vehicle management system which includes a processor programmable to effect control of the vehicle, the method comprising the steps of holding an vehicle management program for the processor in a permanent, encoded, form in first a store and, when it is desired to operate the vehicle, reading that program from said first store to memory associated with the processor whilst decoding that program in accordance with the content of a second store.
2. A method as claimed in Claim 1, including the step of holding a decoding algorithm permanently in said second store and providing that said second store is a device removable from the vehicle.
3. A method as claimed in Claim 1, including the step of providing said second store as a register normally set to ZERO and inputting to that store data which is held therein and used to decode the vehicle management program when it is desired to operate the vehicle.
4. A method as claimed in Claim 3, further including the steps of providing one or more further programs in said first store for checking and/or validating the decoded program passed to the memory associated with the processor.
5. A method as claimed in Claim 4, further including the step of providing that the or each said further program energises an alarm if an attempt is made to start the vehicle whilst said register is set to ZERO.
6. A method as claimed in Claim 4 or Claim 5, further including the steps of providing that the or each said further program permits a predetermined plurality of attempts to start the vehicle to be made before an alarm is energised if the vehicle management program in memory associated with the processor is incorrectly decoded.
7. A method as claimed in Claim 6, including the step of providing that the or each said further program is operable to prevent entry of data to said register for a pre-determined period if the vehicle management program has been incorrectly decoded more than a pre-determined number of times.
8. A method as claimed in any one of claims 4 to 7, wherein said further programs are arranged to prevent operation of said vehicle management program in response to inputs from intruder or other sensors associated with the vehicle.
9. A method as claimed in Claim 8, further including the step of arranging that the or each said further program energises an alarm if one or more of said sensors associated with the vehicle is enabled.
10. A security system for vehicles having an vehicle management system including a processor programmable to effect control of the vehicle, system comprising a first store in which a vehicle management program is permanently held in encoded form and memory associated with the processor to which that program is read, means being provided allowing the program to be decoded as it is read to the memory associated with the processor.
11. A system as claimed in Claim 10, wherein the means allowing the vehicle management vehicle program to be decoded comprises a device for holding a decoding algorithm and which is physically separable from the vehicle when the vehicle is not in use.
12. A system as claimed in Claim 10, wherein said means allowing the vehicle management program to be decoded as it is read from said first store comprises a register to which data is input <RTI>Thy</RTI> a user.
13. A system as claimed in Claim 12, further including means enabling data to be input to said register, said data input means comprising a locking mechanism actuable by a key held by the authorised user.
14. A system as claimed in Claim 12, further including means enabling the data to be input to said register by a user, said data input means comprising an infra red or ultra sonic scanner operable to respond to an infra red or ultra sonic sender actuable by a user.
15. A system as claimed in Claim 12, further including means enabling data to be input to said register by a user, said data inputting means comprising a keypad by means of which a user may input to said register a sequence of digits.
16. A system as claimed in Claim 15, further including means allowing a user to input a sequence of digits via said keypad to said register a predetermined number of times before said alarm annunciators are activated.
17. A system as claimed in Claim 16, further including delay means preventing entry of a sequence of numbers from said keypad for a predetermined period after said predetermined plurality of attempts to enter the correct sequence of numbers have been made.
18. A system as claimed in any one of claims 10 to 17, further including motion and/or intruder sensors actuable to prevent said vehicle management program being transferred to said memory associated with the processor.
19. A system as claimed in Claim 18, further including one or more alarm annunciators which are activated if no data is input to said register.
20. A method of enabling the sequence of numbers usable in a vehicle incorporating a security system as claimed in any one of claims 10 to 19 to be given to an authorised user, the method comprising coupling a central processor including a data base to the telephone system to enable an authorised user to dial thereinto, loading into that data base information relating to user passwords, user telephone numbers, serial numbers associated with the vehicles for which sequences of numbers have been provided, the sequences of numbers for those vehicles and status flags in respect of those vehicles; the information within the data base being organised into two look-up tables the first of which correlates user passwords with user phone numbers and the second of which correlates car serial numbers with the sequence of numbers which must be input thereto to enable operation of the vehicle management system and said status flags, and into a log table into which information relating to user passwords are collated with car serial numbers.
21. A method as claimed in Claim 20, which provides that when an authorised user dials into the central location (at which the database is housed) he is prompted to enter a password and thereafter the serial number associated with the vehicle, a car serial number being then used in the second look-up table to determine the sequence of numbers to be input to the register to enable the vehicle management program to be decoded correctly, the method then further providing that the authorised used is asked to terminate the phone call to enable the central processor to dial the recorded telephone number of the user and repeat to him the sequence of numbers obtained from the look up table.
22. A method as claimed in Claim 21, wherein it is provided that should a status flag in said look-up table indicate the vehicle has been stolen a telephone call is immediately initiated to an authorised authority.
23. Apparatus for carrying out the method of any one of claims 20 to 22, comprising a processor, memory associated with the processor, pulse and/or tone decoders, modems and the like coupled to the processor in which there is provided a central data base programmed to carry out the method the apparatus further including a voice digitiser.
24. A method of operating a vehicle having a vehicle management system as claimed in Claim 1 and as herein described.
25. Apparatus for use in the vehicle security system as claimed in Claim 10, and substantially as herein described with reference to the accompanying drawings.
26. A method as claimed in Claim 20 and as herein described.
27. Apparatus for carrying out the method of Claim 26, and as described herein in particular with reference to Figure 3.
GB9500752A 1994-01-14 1995-01-16 Operating vehicles Expired - Fee Related GB2285702B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB9400593A GB9400593D0 (en) 1994-01-14 1994-01-14 Operating vehicles
GB9500752A GB2285702B (en) 1994-01-14 1995-01-16 Operating vehicles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9500752A GB2285702B (en) 1994-01-14 1995-01-16 Operating vehicles

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Publication Number Publication Date
GB9500752D0 GB9500752D0 (en) 1995-03-08
GB2285702A true true GB2285702A (en) 1995-07-19
GB2285702B GB2285702B (en) 1997-06-04

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0788946A2 (en) * 1995-08-31 1997-08-13 Mercedes-Benz Ag Method and apparatus for programming operational data into automotive parts
WO2004026641A1 (en) * 2002-08-21 2004-04-01 Audi Ag Method for protecting a motor vehicle component against manipulations in a control device, and control device
EP2305927A1 (en) * 2008-04-22 2011-04-06 N-Crypt, Inc. Electronic key system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0788946A2 (en) * 1995-08-31 1997-08-13 Mercedes-Benz Ag Method and apparatus for programming operational data into automotive parts
EP0788946A3 (en) * 1995-08-31 1998-06-10 Daimler-Benz Aktiengesellschaft Method and apparatus for programming operational data into automotive parts
US5838251A (en) * 1995-08-31 1998-11-17 Mercedes-Benz Ag Method and device for programming operating data into vehicle components
WO2004026641A1 (en) * 2002-08-21 2004-04-01 Audi Ag Method for protecting a motor vehicle component against manipulations in a control device, and control device
DE10238094B4 (en) * 2002-08-21 2007-07-19 Audi Ag Method for protecting against manipulations in a control device for at least one vehicle component and control unit
US8549324B2 (en) 2002-08-21 2013-10-01 Audi Ag Method for protecting a motor vehicle component against manipulations in a control device and control device
EP2305927A1 (en) * 2008-04-22 2011-04-06 N-Crypt, Inc. Electronic key system
EP2305927A4 (en) * 2008-04-22 2014-01-15 Ncrypt Inc Electronic key system

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Publication number Publication date Type
GB2285702B (en) 1997-06-04 grant
GB9500752D0 (en) 1995-03-08 grant

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PCNP Patent ceased through non-payment of renewal fee

Effective date: 20100116