TWI228089B - Immobilizer and attesting method by immobilizer - Google Patents

Abstract

The present invention provides an immobilizer, which is high in reliability of attestation, surely antitheft for a vehicle with its engine stopped, preventive from any misoperation, easy in fitting, and particularly effective for motorcycles, and an attestation method by the immobilizer. The solution of the present invention is that random number data is generated based on the engine starting time data stored in a storage means, the random number data is transmitted to a transponder through a radio part and at the same time, a key specific information is coded using a specified coding method based on the random number data to generate an attestation code, the transponder receives the generated attestation key in which the key specific information is coded using the coding method based on the random number data, an engine start permission signal is transmitted to an engine control unit when the attestation code matches with the attestation key, and the time until the engine is started after a power source for an immobilizer is turned on is stored in the storage means. Further, after the engine is started, the radio part is shut down and the immobilizer is stopped.

Description

1228089 Modified in the month No. 89112581 V. Description of the invention (1) [Detailed description of the invention] [Technical field to which the invention belongs] t The invention relates to information based on the information of a two-wheeled motor vehicle and a transponder built into the engine key. Authentication of a specific key to prevent theft of a vehicle and the authenticator of the anti-theft device L Xianli Technology] '::, Regarding one of the anti-theft devices to prevent theft of a vehicle you], there are = Please case special Kaiping 1 bu 9 Bulletin 1 509. According to the bulletin, bow 丨 engine Ξ 具备 = has a seed generating device that has: and generates Λ random numbers, and follows: ^. The seed is installed, and the random number is encrypted by a cryptographic algorithm. The authentication key generation device '⑯External Receiver == Key Receive §fl Apparel' compares the external key with the authentication key and pays :: Read the vehicle control information of the vehicle control information, such as the compliance determination device that releases the security, and read the engine ’s rotating U bucket shot volume, 'intake air volume, throttle opening, and time value of the idling timer at water temperature. Device. Θ reports that the key unit on the user side is equipped with a seed receiving device that accepts a random number set by the engine control unit, and a cryptographic algorithm that generates the same device as-will follow the random = " π method The key generation device that generates a key by encoding the key, and the key transmission device of the key receiving device that sends the key to the engine control unit, and the engine control unit uses the vehicle control information reading device to read the number of revolutions. The fuel injection amount 'Intake air volume, throttle opening, water temperature, etc. Page 5 V. Description of the invention (2) ~: Vehicle control information, using the ^^^^ -— wheel control information generating device to generate random number units 1 ^ 口 " 'value. The key unit on the user side is a plurality of random numbers for receiving 卞 m, the name 'is in the early position, and you use the encryption algorithm 敬: the key generation device i' and the seed; control :: and then use ":; The ":" to the heart "the key with the same key early position and the authentication of the electric device = the matching determination device compares the problem on the user's side, and if it matches, the security is lifted. However, in the aforementioned defense, it is only the action of: the vehicle control security effect based on the number of aircraft. Therefore, there is no car that does not operate the engine = In addition, in the S.H. Bulletin, for the sake of safety after the fire switch =, there is no load on how to keep the day counting: the timer count value. However, although the burglar-proof dreams you, it's worth using the method. :: number, fuel injection amount, suction = :: Chess, etc. It is not necessary to collect the height of _ for the driving control information such as throttle opening, water temperature, etc., which is collected by one of the engines ’engine control information. If the engine is attached with the engine, it is not practical for the vehicles that are already on the market and t = information. It is very difficult to change the engine ram. It is only necessary to install the anti-theft device. Because of this situation, the invention is highly guilty and can prevent the engine ’s scriptures. It is easy to install while providing an authentication error. The second vehicle Stolen can prevent mistakes "L eight is easy for the engine control device ----------- c: \ patent case file \ 89 \ 891] 2581 \ 8911258] (replacement) -1" page 6

A ^ «089 ^ ^ 9112581 repair" Description of the invention ^^ month _ ^ Motor two-wheelers and anti-theft devices such as Pei π w, bicycles and other two-wheelers are effective anti-theft devices [for solving technical methods. Means of solving the problem] The first item of Zibai Piming's patent scope is Gong = the authentication method of the anti-theft device stored in the memory device and ° is based on the random number data and the starting time data of the engine. At the same time as the generator, the random number data is forwarded by the Ministry of Radio and Television of the United States, and the key is inherent; =: based on the material, the random number data is based on the predetermined encryption method, and the code is * coded. As a result, an authentication code is generated. After receiving the information, the Z 4 encryption method is used to make the transponder match the key of the key. When the authentication key is matched, the authentication code and the power of the authentication theft device are 0N1. ^ Send out the engine start permission signal, which is memorized in the memory of the Department of Defense, and the time until the start is used as the starting time information. At the same time, stop the G t key. After the engine is started, stop the patent application of the Radio Department; ^ Features By. The power source of the device is from 0N to a non-theft anti-theft device. The anti-theft device is provided with a memory device that counts the time from the start of the anti-theft time data to the start of Shizhuang to generate a start-up memory. The method of generating random number data based on the start date of random number storage and random data generation is based on the key 2 tk machine number data and a predetermined encryption code is used to generate a strong ¥ * h report for the result of encryption Generate the recognition random number of the authentication code: # ΐ 5 A: The same as transferring the random number data of the m-code, the receiving code is ==; = = the radio department of the authentication key, and when the authentication is established as the payment date. Send engine start permission to the engine control device

1228089 Case No. 89jj2581 Year 5. Description of the invention (4) The $ ^^ authentication device is composed of the start time information to authenticate the key, and then = after the engine is started, the radio department is stopped and its characteristics are prevented. Embodiment of the invention] The mode of the present invention will be specifically described below with reference to the drawings. FIG. 1, FIG. 3, and FIG. 4 are diagrams showing an embodiment of the present invention. : 1_'display: a structure diagram of an embodiment of the anti-theft device of the present invention, FIG. 2 diagram, ',' structure diagram of an embodiment of a transponder, FIG. 3 shows the operation of the anti-theft device in the shape of State diagram. Fig. 4 is a flowchart showing the operation of the protective clothing of Fig. 丨. In ft ~ 4, the anti-theft device is wirelessly communicated with the transponder 20 built in the key 3 of a motorcycle and a vehicle with an engine ^, etc., to send information from the transponder 20 ... 3, No, No. Cylinder Yang Shi 丨 Mind your heart 丨 Monthly report Feng Ji, identify the key 疋 W vehicle □ key, in order to prevent the car from being stolen. The anti-theft device i 0 is set by the central processing unit (hereinafter referred to as c p and the power supply unit 12). The electrical erasable and programmable read-only memory (Electrically Erasable and Programmable Read 0 i

Memory, hereinafter referred to as EEPR0M) 13, a communication interface ", composed of nly part 15 and radio CPU11 is a central computing device for controlling the anti-theft device. Power supply section 12 is supplied from battery 7 to anti-theft device 1〇 The side of the power source of the operating flow is 7. The battery 7 is connected to the power supply unit 12 by being installed in the key input cylinder and 4 = direct fire switch 5. The ignition switch 5 is inside the key recording cylinder 4. And when the rotation is set to the running position, it becomes ⑽ OFF 3 Insert

C: \ Master File of Patent Cases \ 89 \ 89112581 \ 8911258] (Replace)]. Ptc Page 8 1228089

1228089 Show now «HI IZOOl

Description of the Invention (6) __ The antenna is used for receiving the information generated from the helmet side sent from the immobilizer 10 for transmission ^ Telecommunications 谠 and the radio department which changes or releases the anti-theft device 2 2, bet 4 | h The radio signal is given as IC23 'Information inherent to the storage key: the certification key of the non-device 20 is EEPR0M24 and is equivalent to the secondary battery VI. . ^ L 〜 Liao Fen Yi 2 1 所 蓉 # of the volatile memory device Secondly, the operation of the anti-theft device 10 will be described below. : Cheng Erzhong, the components and numbers in parentheses correspond to the following: When the driver uses the recording key 3 to start the components within ^ degrees of force of the car, the recording key 3 is inserted into the recording cylinder 4. Then move to ⑽ position). Then, the ignition is turned on and the electric 2 is turned to the running position. Then, VDD17 is output from the power supply section 12, and the battery 2 is anti-theft device. When starting the action, first of all, set two openings: wide,:! Equipment, a come to the street to set 10 action-people's group: 1 engine control early position 2 hunting engine start signal line 2s sent:

A signal is sent to confirm whether the engine is operating (s101). The insert key 3 is not yet activated, so the CPU 11 reads out the data stored in EEPROM13 (S102). In addition, the starting time data is generated by using the timing device 丨 & B stealth device 1, 0 from the start of the operation until the engine is started, and the starting time information when the engine was started last time is stored in advance in EEPR0M13. The timing of generating the start time data will be described later. In addition, at the time of starting the engine for the first time after the production of the vehicle, the data of EEPR0M1 3 is time 0. Secondly, the CPU 11 generates random number data based on the starting time data read by the random number generating device 11b (S103). Random Number Occurred ^

C: \ Master file of patent cases \ 89 \ 89112581 \ 89112581 (replacement)-]. Ptc ^

IHB 1228089 -8911258J_ 年月 ^ —_ ^ Amendment V. Description of the invention (7 ^ ^^ ------ The size of the material is, for example, 10 digits. Then, CPU1 and i1 use the message data to generate clothes. 1 C, generating transmission data from the radio unit 15 to the repeater 2 0 (S1 04). Do not use the transmission data generating device Uc to directly send random number data to the radio unit 15 Possibly. However, in the form of this implementation, the information of limited vehicle type is added to the random number data to generate information. In other words, for example, the two-digit number of limited vehicle type is added at the beginning of the random number data. Password. The function and effect of the password will be described later. Then, send the generated transmission information from the radio department 5 to the forwarding cry ..., 20 (S105). On the transponder 20 side, borrow the antenna 2 5 And the radio department 22 receives the transmission information from the anti-theft I set to 10 (S1 51). Based on the password + random number data demodulated by the radio department 22, the authentication key in IC23 is generated using the authentication key. The generating device 2 3 a generates an authentication key (s 1 5 2). The authentication key system uses the memory EEPR 0 The encryption key of the information inherent in the recording key 3 of Μ 2 4 is used to encode and encode the random number data; for example, it is 2 to 4 bits of data. There is no particular limitation on the method of encryption. For example, 1 1977 Data Encryption Standard (Data Encryption Standard (hereinafter referred to as DES)) developed by the Bureau of Standards of the United States Department of Commerce, etc. The transponder 20 sends the generated authentication key by the radio unit 22 and the antenna 25 The information is transmitted to the anti-theft device 10 (S153). The authentication key generation device 2 3 a of is 20 is forwarded. When receiving the information of the anti-theft device 1 0, it does not act immediately, but it must first confirm whether the content of the password can generate an authentication. Of course, if the incorrect password or the fork code is not included in the beginning, 'transponder 20 will not generate and send the authentication key. As mentioned above, the transmission of authentication key from the transponder 20 side is restricted. As a result, when the key 3

Patent Archives \ 89 \ 89] 12581 \ 89112581 (Replace)]. Ptc page n 1228089

Case 5 Tiger 891125R1 V. Description of the invention (8) When approaching the anti-theft device of other car types, you can avoid issuing the correct authentication. It can be mixed with other vehicles. The transponder 20 does not have a battery. It is borrowed to prevent it. The stolen device sends it before the password + random number data. It also comes from the n fl + Cheng + wide force δΙΙ, so that the radio department 2 2 acts. The same% causes the capacitor 21 to be charged. Tashi ~ neck stop 1 η ♦ 仏 仏 not replace σ ’capacitor 2 1 is the power signal sent by the radio unit 15 of the anti-theft device 10 to make the transponder 20 act. Where the electricity becomes a one-person injustice. When the forwarder 20 is generating the authentication key, cPim's authentication code generating device 11d is = after the side of the thief device 10, V — the generation of the identification code (S106). The technical code is based on the fork code + random number data. The inherent feeling of the key 3 of EEPROM13 is the same. It is converted into the user of the forwarding device. Second, the anti-theft device 10 receives the authentication key ⑶ from the repeater 20. Then, in the authentication device i! E of ypui 1, comparison authentication between the authentication code and the authentication key is performed (S1 08). When the authentication code matches the authentication key, an engine start permission signal occurs. The engine start permission signal is sent from the CPU through the communication interface 14 to the engine control device 2 (s109). When the engine start permission signal is received, the engine control device 2 starts the engine to execute the engine start control 2a. In actual automobiles and motorcycles, the engine can be started due to the engine start permission signal, and the driver can start the engine by turning on the starter switch (starting switch). After the engine control device 2 confirms that the engine is started, it executes an engine start signal 2 b to the anti-profit device 10.

1228089 ____Case No. 89112581__Year Month_Day Amendment V. Description of the Invention (9) The anti-theft device 10 is to re-confirm the engine start (S101). Here, after the start of the engine is confirmed, the timing of the start signal of the timing device 1 1 a is terminated, and the timed start time data is written in EEPR0M13, and the data at the previous start is updated (S1 11). The update method is to add new start time data to the start time data already written in EEPROM13 to generate new start time data, or to use the new start time data to overwrite the previous start time data. Next, 'CPU1 1 turns on the power switch of the radio section 6FF and stops the radio section 15 (S1 1 2). Then, after completing a series of key authentication and pairing operations, the CPU 11 is stopped, and the anti-theft device is stopped (s). * ^ In the form of this embodiment, the start of the timing of the start time is taken as the operation start time of the anti-grey setting of 10, however, it is also possible to start the timing when the anti-theft device 10 outputs the engine start permission signal. In addition, in this embodiment, the timing device i 丨 a, the random number generating device lib, the transmission data generating device 11c, the authentication code generating device 丨, and the authentication device 1 1e are implemented by software c P u 1 1 And achieve it. However, it is also possible to implement these devices using only hardware circuits such as logic circuits instead of the CPU 11 or a combination of software and hardware. In addition, when the cipher key unique to the 3 is written in the EEPR0M13, an external writing device 28 such as a personal computer is connected, and the EEPR0M13 can be written by the communication interface 14 & cpun instead of the engine control unit 2. Regarding the writing of the EEPR0M24 forwarded to 20, the external writing device 28 is connected to the antitheft device 10 like the EfPROM13 of the antitheft device 10, and the EEPROM 24 is written by the radio signal of the antitheft device 10. phoenix

C. \ Patent Case Files 1] 2581 \ 89112581 (replacement), l.ptc ~ page 13 " '------ 1228089 Amendment 5 Tiger 89112581 V. Description of Invention (10) In this form, random number data is generated based on the starting time data from the time when the power of the antitheft device 10 is turned on until the engine is started. Based on the random number data, the inherent information of the key 3 is encrypted to generate an authentication key. And authentication code, and use the authentication key and authentication code to authenticate the key. 'The time from the power source 0N of the anti-theft device 10 to the start of the engine is different each time the engine is started. It is impossible to predict or control this time. Therefore, it is difficult to speculate that the random number data generated based on the dynamic time data is highly reliable. In addition, memorize the starting time data in EEPR0M13, then = start the engine first = generate a random number based on the starting time data of 13 and delete it. Therefore, the theft of a vehicle with an engine stopped can be performed more surely. In addition, the engine control unit 2 can only accept the result of whether the engine is started or can generate the relationship of the starting time data. The engine control: the information of the * is only one kind, which does not require a high-performance and high-priced bow; Lighten the load of the engine control device 3, especially effective for setting the engine ^ j to 3 for simple motorcycles and bicycles with engine. The early temple two-wheeler is very different. At the same time that the wireless unit is stopped due to the engine starting, the relationship of the device 10 can prevent theft prevention after the engine is started, and prevent the engine from stalling. Error operation of x [Effect of invention] The invention according to item 1 of the scope of patent application to prevent theft. The starting time data for the time until the engine is started is randomly generated for the power source 0N, sentence &

1228089 Case No. 89〗 1 ^ R1 V. Description of the invention (11) ------ This random number is used as the basis of the inherent information of the recording key to-· ο Fruit to generate 5 forbearance keys and authentication codes to make the seats The authentication key and the key to the key of the record's authentication. The anti-theft device is from the electric start to the engine start: day: $: line The engine varies every time the engine is started, but it is almost predictable:: is a random number generated based on the starting time data of this evening. Therefore, the reliability of the authentication using the random number is surplus and the data of the start time is stored in the memory device a, t. The time 'is stored in advance at the start of the memory device. Therefore, the theft of life can be more reliably stopped. The vehicle in W%, as long as it receives the relationship between the engine control unit and the engine that can generate the starting time data, the engine control unit reports: only: one, does not require high performance and high price: = love again, Stop the radio with the engine started: no; yes. The relationship of the device 'prevents anti-theft wearing after the engine is started: at the same time as preventing theft of the engine, it can prevent "engine failures such as engine stalling; etc. ;; The power source ON until the engine is started. The clothing is set from the anti-theft time data, and the random number generating unit uses the start == to start into a random number, based on the random number, and ^ two between two 枓 as the basis to generate the key. The social effect that the inherent information is encrypted] When the key authentication code matches the authentication key, the t: identification and tolerance code, when the clothing is sent to the engine control device

1228089 Case No. 89Π2581 Month, Amendment V. Description of Invention (12) The engine start permission signal is issued. The start time is different. It is impossible to predict or control the random number generated based on the data. The authentication using the random number can be saved. When the start time data is memorized, the random number is stored in the memory device in advance. . As a result, the theft can be more reliably identified. In addition, there is only one kind of relationship information that can be generated from the engine control unit, which can generate starting time data. It does not require high performance to reduce the burden on the engine control device. Especially for two-wheeled motor vehicles and engines with self-renewal, after the engine starts, the device is stopped. The relationship can prevent the engine from starting at the same time, and can prevent the engine from being misfired. [The description of the component number] The data is the time every time the engine starts. Therefore, the data at 0N of this power source is difficult to predict and has very high reliability without reproduction. The memory device is based on the starting time data of the next engine start and effectively prevents the vehicle engine in the engine from stopping if the engine starts. As a result, the engine control device needs to output a high-priced engine control device. It is effective for two-wheelers such as easy driving. At the same time as the radio department, the malfunction of the immobilizer after the immobilizer is stopped. 2 Engine control unit 2a Engine start control 2b Engine start signal generation 2 s Engine start signal line 3 Recording key 4 Recording key cylinder 5 Ignition switch 6, 25 Antenna

8911258] (replace) -1.ptc Page 16 1228089 Revision_Case No. 89112581 V. Description of the Invention (13) 7 Battery 10 Anti-theft Device 11 Central Processing 11a Timing Device lib Random Number 11c Message Information Lid Authentication Code Health Lie Authentication device 12 Power supply section 13, 24 Electrical type 14 Communication interface 15, 22 Radio section 16 Radio section 17 DC power supply 20 Repeater 21 Capacitor 23 Authentication key generator 23a Authentication key generator 28 External writing unit generation device generation device into device Programmable read only memory power switch into 1C into device device

89112581 (Replacement)-: I.ptc Page 17 1228089 Case No. 8912581 Modified Drawing Brief Description Figure 1 shows the structure of one embodiment of the anti-theft device of the present invention. Figure 2 shows the transponder of the present invention. Structure of an embodiment. FIG. 3 is a structural diagram showing an operating state of the anti-theft device of FIG. 1. FIG. FIG. 4 is a flowchart showing the operation of the anti-theft device of FIG. 1.

C-Λ Patent Case Files \ 89 \ 89]] 258] \ 89112581 (Replacement) -l.ptc Page 18

Claims (1)

1228089 --- 89112, ¾ ^ Amendment VI. Scope of patent application 1. Based on the information of the transponder of the authentication method of an anti-theft device, the key certificate method built in the vehicle based on f is distinguished by: The identification of the key of the anti-theft device is based on the random number data stored in advance in the memory device. Then, based on the data without the start time and the forwarding state, the random number data is transmitted to the random number. The method is based on the inherent condition of the key, and the predetermined green message is used to generate the authentication code based on the random number data. The ^ result is used to generate the authentication code. The inherent information of the key is encrypted. When the key code matches the authentication key, after the authentication key, when the authentication signal is stored in the memory device from the start time of the anti-theft device engine, and then, after the time is started, stop the aforementioned radio department = ^ 〖丨 ^ Starter. J is a complete anti-theft device 2. It is a kind of anti-theft device, based on the vehicle information built-in to identify the specific key of theft π = hair device is equipped with: Eight features are from the anti-theft device The timing device that generates the starting time data from the time when the power is turned on until the engine starts, memorizing the starting time = ^ number memory device, the starting time data stored in the memory device is a random number that is a random number data. The generating device is based on the random number resource & I, and uses a pre-encrypted method to encrypt the key's inherent information with a cryptographic base to generate an authentication code. The authentication code generation device sends the transponder to the transponder: While counting data, the reception is based on the random number data: Μ C: \ General file of patent cases \ 89 \ 89】] 258] \ 89] 12581 (Replacement)-]. Ptc 19th Yu 1228089 Case No. 89112581 Amendment VI. Patent Application Scope This cryptographic method and the key The radio unit of the authentication key generated by encryption of the inherent information, and an authentication device that sends an engine start permission signal to the engine control device when the authentication code matches the authentication key, and uses the start time data to authenticate the key In addition, after the engine is started, the radio unit is stopped and the anti-theft device is stopped. C: \ Master File of Patent Cases \ 89 \ 891] 258] \ 89]] 2581 (Replacement)-]. Ptc Page 20