CN1633058A - Vehicle locating alarm device with random cipher theft proof capability and based on network function - Google Patents
Vehicle locating alarm device with random cipher theft proof capability and based on network function Download PDFInfo
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- CN1633058A CN1633058A CNA2004100658296A CN200410065829A CN1633058A CN 1633058 A CN1633058 A CN 1633058A CN A2004100658296 A CNA2004100658296 A CN A2004100658296A CN 200410065829 A CN200410065829 A CN 200410065829A CN 1633058 A CN1633058 A CN 1633058A
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Abstract
A random cipher and code anti-stolen device of automobiles and positioning alarm device based on network functions includes: an alarm signal amplifying detection circuit, single chip central control circuit, encoding transmitting circuit and related code receiving circuit, the mobile communication network and its information system utilizes the positioning function to realize detection to illegal actions and location alarm, an encoding emit circuit possibly set on the cell phone can generate random ciphered codes, its related receiving circuit can receive and remember random ciphered code and alarm objects, the single-chip central control circuit, encode receiving circuit and the alarm signal amplified detection circuit can be set on automobiles, the alarm information can communicate with mobile network and its information system, Internet and its information system, the detection circuit can be connected with the electronic or electric circuits, suitable for GSM or CDMA systems.
Description
Technical field
The present invention relates to the burglar alarm of motor vehicle.
Background technology
Communication network and the information system thereof generally used in the world today, the Internet and information system thereof are the technology of comparative maturity; The function that mobile telecom network has mobile phone speech communication, short message, digital fax, movable positioning system has covered all parts of the country in China; The movable positioning system of mobile telecom network has that cost is low, popularity is high, reliability compares advantage of higher; Comparatively speaking the GPS navigation system have cost height, volume greatly, do not popularize, signal is weak, can't transmit problems such as literal and pictorial information.Existing cipher anti theft warning system roughly has two defectives on the market: the one, and Password Length is limited, and the offender just can launch up to ten thousand decryptions with " scanner " in a few minutes, make password ineffective; The 2nd, password is single, and the offender can note with " catching a yard device " and be used.The e-mail of available the Internet, online warning, multimedia function; The cell phone intelligent platform of the Symbian operating system of the WindowsCE of available Microsoft, WindowsMobile2003 operating system or Handspring or the Palm operating system of Palm; Fixedly facsimile function and other traditional function of PSTN (traditional telephone communication network) network; Existing locating cellphone such as KZ-820, MotrolaV870 and T71X on the available market; The information network system of available GSM, 3G, CDMA, CDMAEX, WCDMA, ATM, PSTN, IP phone, PSTN intelligent network, GSM intelligent network, CDMA intelligent network also all is the technology of comparative maturity.
Summary of the invention:
The object of the present invention is to provide the locating alarm device of the antitheft and function Network Based of a kind of random cipher of motor vehicle, warning message is by single-chip microcomputer central control circuit and the mutual UNICOM of mobile telecom network or by the mutual UNICOM of mobile telecom network and the Internet; The alarm signal amplification detection circuit can be connected on the electronics or electric wiring of motor vehicle; The technology of the comparative maturity that can directly utilize is as described below: the generation of warning message and transmission can utilize the function of mobile telecom network and the Internet; Can utilize the positioning function of the movable positioning system of mobile telecom network; And the cell phone intelligent platform that can utilize the WindowsCE of Microsoft or WindowsMobile2003 operating system is realized the generation of warning message and transmission and is reached mutual UNICOM with mobile telecom network and the Internet; Existing locating cellphone such as KZ-820, MotrolaV870 and T71X on the available market; The information network system of available GSM or 3G or CDMA or ATM or PSTN or IP phone or Personal Handyphone System also all is the technology of comparative maturity.
Technical scheme of the present invention: this device comprises alarm signal amplification detection circuit, single-chip microcomputer central control circuit, encoding transmitting circuit and corresponding with it coding receiving circuit; Mobile telecom network and information system thereof can utilize the positioning function of the movable positioning system of mobile telecom network to realize detection and locating alarming to illegal act; Encoding transmitting circuit can be arranged on the mobile phone, and encoding transmitting circuit can produce random cipher, and corresponding with it coding receiving circuit can receive and remember random cipher and warning object; Single-chip microcomputer central control circuit, coding receiving circuit and alarm signal amplification detection circuit can be arranged on the motor vehicle; Warning message by the single-chip microcomputer central control circuit can with mobile telecom network and the mutual UNICOM of information system thereof.
Can utilize the Internet and information system thereof, warning message by the single-chip microcomputer central control circuit and by mobile telecom network and information system thereof can with the Internet and the mutual UNICOM of information system thereof.
Above-mentioned alarm signal amplification detection circuit can be connected on the electronics or electric wiring of motor vehicle.
The generation of above-mentioned warning message and transmission can utilize information system and the speech communication of mobile phone or the function of short message or multimedia message or digital fax of mobile telecom network; The generation of warning message and transmission can utilize information system and QQ or e-mail or virtual mobile phone or the warning on the net or other the multimedia function of the Internet.
The movable positioning system of above-mentioned mobile telecom network and locating cellphone can be determined the place of warning substantially, and setting accuracy is 1M to 50M in the urban district, and setting accuracy is 1M to 100M in the urban district in addition; And can utilize movable positioning system and the map data information of GIS (GIS-Geographic Information System) and the mutual UNICOM of GPS (global positioning system) of mobile telecom network, setting accuracy is 1M to 20M in the urban district, and setting accuracy is 1M to 50M in the urban district in addition; Therefore can be implemented in the monitoring and the tracking of nationwide.
Can utilize the cell phone intelligent platform of the WindowsCE of Microsoft or WindowsMobile2003 operating system, maybe can utilize the cell phone intelligent platform of the Symbian operating system of Handspring, maybe can utilize the cell phone intelligent platform of the Palm operating system of Palm to realize the generation of warning message and transmission and reach mutual UNICOM with mobile telecom network and the Internet; Also can utilize fixing PSTN (traditional telephone communication network) thus the facsimile function of network and other traditional function are realized the transmission of warning message and are reached the mutual UNICOM with mobile telecom network and the Internet.
This device is applicable to the information network system of GSM or CDMA or 3G or CDMAEX or WCDMA or CDMA1X or ATM or PSTN or IP phone or Personal Handyphone System or PSTN intelligent network or GSM intelligent network or CDMA intelligent network or NGN.
Above-mentioned warning object can preestablish; The warning object that can be scheduled to can be mobile telecom network and information system thereof or the Internet and information system thereof or the fixing object of PSTN and information system thereof, and the warning object that can subscribe can have one to 100; Encoding transmitting circuit that can produce random cipher can corresponding one to 1,000 coding receiving circuit that can receive and remember random cipher and warning object; Coding receiving circuit can be accomplished only to receive and remember a random cipher.
Above-mentioned alarm signal amplification detection circuit is made up of time-base circuit IC1 and peripheral circuit; Encoding transmitting circuit comprises random cipher encoder IC2 and modulation module I C3; Be arranged on four unlocking cipher input D1 on the random cipher encoder IC2, D2, D3, D4 and respectively with four unlocking cipher input D1, D2, D3, the corresponding unlocking cipher enter key of D4 S1, S2, S3, S4; Serial output terminal D0 on the random cipher encoder IC2 and modulation module I C3 link; Antenna TX1 and modulation module I C3 link; The coding receiving circuit comprises that random cipher decoder IC5 reaches and the corresponding modulation module I of modulation module I C3 C4; Antenna TX2 and modulation module I C4 link; The random cipher decoder IC5 that is connected with IC3, the OSC end that is arranged on the modulation module I C3 is formed clock oscillator RC jointly with resistance R 6, capacitor C3; Study input LRN1, study output LRN0 and decoding output D1 ' D2 ' D3 ' D4 ' are set on random cipher decoder IC5.
Description of drawings
Fig. 1 is the general illustration of the basic functional principle of this device;
Fig. 2 is the The general frame of the basic functional principle of this device;
Fig. 3 is the The general frame based on the basic functional principle of the mobile phone of GSM and information system of this device;
Fig. 4 is a GSMMODEM internal circuit block diagram;
Fig. 5 is the basic principle figure of alarm signal amplification detection circuit;
Fig. 6 is the basic principle figure of encoding transmitting circuit;
Fig. 7 is the basic principle figure of decoding receiving circuit;
Fig. 8 is the main flow block diagram;
Fig. 9 is warning object and random cipher storage setting program block diagram;
Figure 10 is for separating anti-flow chart.
Embodiment
Antitheft and locating alarm device function Network Based of the random cipher of a kind of motor vehicle of present embodiment of the present invention meets the correlation technique standard; See Fig. 1 to Figure 10, this device comprises alarm signal amplification detection circuit, single-chip microcomputer central control circuit, encoding transmitting circuit and corresponding with it coding receiving circuit; Mobile telecom network and information system thereof can utilize the positioning function of the movable positioning system of mobile telecom network to realize detection and locating alarming to illegal act; Encoding transmitting circuit can be arranged on the mobile phone, and encoding transmitting circuit can produce random cipher, and corresponding with it coding receiving circuit can receive and remember random cipher and warning object; Single-chip microcomputer central control circuit, coding receiving circuit and alarm signal amplification detection circuit can be arranged on the motor vehicle; Warning message by the single-chip microcomputer central control circuit can with mobile telecom network and the mutual UNICOM of information system thereof, can utilize the Internet and information system thereof, warning message by the single-chip microcomputer central control circuit and by mobile telecom network and information system thereof can with the Internet and the mutual UNICOM of information system thereof; The alarm signal amplification detection circuit can be connected on the electronics or electric wiring of motor vehicle, and the generation of warning message and transmission can utilize information system and the speech communication of mobile phone or the function of short message or multimedia message or digital fax of mobile telecom network; The generation of warning message and transmission can utilize information system and QQ or e-mail or virtual mobile phone or the warning on the net or other the multimedia function of the Internet; The movable positioning system of mobile telecom network and locating cellphone can be determined the place of warning substantially, and setting accuracy is 1M to 50M in the urban district, and setting accuracy is 1M to 100M in the urban district in addition; And can utilize movable positioning system and the map data information of GIS (GIS-Geographic Information System) and the mutual UNICOM of GPS (global positioning system) of mobile telecom network, setting accuracy is 1M to 20M in the urban district, and setting accuracy is 1M to 50M in the urban district in addition; Therefore can be implemented in the monitoring and the tracking of nationwide; Can utilize the cell phone intelligent platform of the WindowsCE of Microsoft or WindowsMobile2003 operating system, maybe can utilize the cell phone intelligent platform of the Symbian operating system of Handspring, maybe can utilize the cell phone intelligent platform of the Palm operating system of Palm to realize the generation of warning message and transmission and reach mutual UNICOM with mobile telecom network and the Internet; Also can utilize fixing PSTN (traditional telephone communication network) thus the facsimile function of network and other traditional function are realized the transmission of warning message and are reached the mutual UNICOM with mobile telecom network and the Internet; This device is applicable to the information network system of GSM or CDMA or 3G or CDMAEX or WCDMA or CDMA1X or ATM or PSTN or IP phone or Personal Handyphone System or PSTN intelligent network or GSM intelligent network or CDMA intelligent network or NGN.The warning object can preestablish; The warning object that can be scheduled to can be mobile telecom network and information system thereof or the Internet and information system thereof or the fixing object of PSTN and information system thereof, and the warning object that can subscribe can have one to 100; Encoding transmitting circuit that can produce random cipher can corresponding one to 1,000 coding receiving circuit that can receive and remember random cipher and warning object; Coding receiving circuit can be accomplished only to receive and remember a random cipher; Existing locating cellphone such as KZ-820, Motrola V870 and T71X on the available market.
See Fig. 2 to Figure 10, except that the technology of the above-mentioned existing comparative maturity that can directly utilize, the basic hardware circuit composition of other of this device of realization present embodiment and the function of each several part are as follows:
Present embodiment is divided by function and is made up of following 7 parts substantially: 1, alarm signal amplification detection circuit; 2, single-chip microcomputer central control circuit; 3, encoding transmitting circuit; 4, decoding receiving circuit; 5, the telephone number memory cell of random cipher and warning object; 6, based on the alarm unit of the MODEM of mobile phone; 7, power circuit.
Total basic functional principle of present embodiment is as follows: encoding transmitting circuit can be compiled password at random automatically, and Chuan Shu password can be all inequality each time; The alarm signal amplification detection circuit send the single-chip microcomputer central control circuit to handle after detected signal is done processing and amplifying; The single-chip microcomputer central control circuit then judges according to this signal whether illegal act is arranged; If illegal act is arranged, then read the telephone number of default warning object from the telephone number memory cell of random cipher and warning object; Send short message or other warning message of the mobile phone of warning then to this warning object by the alarm unit based on the MODEM of mobile phone, the movable positioning system of mobile telecom network can roughly be determined the place of warning simultaneously; This system can also be provided with warning object such as police's the mobile phone or 110 (110 alarm calls need literal, visual receiving function) or the e-mail of the Internet freely; The user can also deploy troops on garrison duty to this device or separates anti-by mobile phone.
See Fig. 2 to Figure 10, present embodiment be this device based on the GSM mobile handset of the widely used GSM mobile telecom network of China and the basic functional principle of information system thereof; The warning object of present embodiment can preestablish; The warning that can be scheduled to is to liking the GSM mobile handset of GSM mobile telecom network, and the warning object that can subscribe has one; The corresponding coding receiving circuit that can receive and remember random cipher and warning object of encoding transmitting circuit that can produce random cipher; Coding receiving circuit only receives and remembers a random cipher.
See Fig. 2 to Figure 10, basic functional principle is as follows: see Fig. 6, encoding transmitting circuit comprises random cipher encoder IC2 and modulation module I C3; Be arranged on four unlocking cipher input D1 on the random cipher encoder IC2, D2, D3, D4 and respectively with four unlocking cipher input D1, D2, D3, the corresponding unlocking cipher enter key of D4 S1, S2, S3, S4; Serial output terminal D0 on the random cipher encoder IC2 and modulation module I C3 link; Antenna TX1 and modulation module I C3 link; The chip model of random cipher encoder IC2 is ACM1330E, this chip internal is integrated with clock circuit, unblank enter key S1, S2, S3, S4 can press the back simultaneously and produce a random cipher in that ACM1330E random cipher encoder IC2 is inner, and carry out producing a new keying sequence after the computing with the unlocking cipher of input, export by serial output terminal D0; See Fig. 7, the coding receiving circuit comprises that random cipher decoder IC5 reaches and the corresponding modulation module I of modulation module I C3 C4; Antenna TX2 and modulation module I C4 link; The random cipher decoder IC5 that is connected with IC3, the OSC end that is arranged on the modulation module I C3 is formed clock oscillator RC jointly with resistance R 6, capacitor C3; Study input LRN1, study output LRN0 and decoding output D1 ' D2 ' D3 ' D4 ' are set on random cipher decoder IC5; Modulation module I C3 and IC4 are a pair of long wave serial data modulation modules, the chip model is T630 or T631, the operating voltage of T630 or T631 is 1.5V to 20V, operating current is 0.4mA to 22mA, operating frequency is the long wave of 150KHz, transmitting power is 5mW to 20W, and effective working distance is 50 meters to 5 kilometers; The chip model of random cipher decoder IC5 is ACM1550D, the signal that clock oscillator RC joining with it produces carries out being exported by decoding output D1 ' D2 ' D3 ' D4 ' after secret key discriminating, computing, the decoding through inside, and control alarm signal amplification detection circuit reaches the action based on the executive circuits such as alarm unit of GSM MODEM; The study input LRN1 that is provided with on random cipher decoder IC5, study output LRN0 are used to make the keying sequence of random cipher decoder IC5 synchronous; Random cipher decoder IC5 learns and memory random cipher sequence and GSM mobile handset number after receiving code signal; See Fig. 5, the alarm signal amplification detection circuit is made up of time-base circuit IC1 and peripheral circuit; Be made of transducer CGQ and corresponding resistance, electric capacity and detect the loop, alarm signal outputs to the single-chip microcomputer central control circuit; See Fig. 3, Fig. 4, Fig. 8, Fig. 9 and Figure 10, the single-chip microcomputer central control circuit is made up of single-chip microcomputer and peripheral circuit; Its major function is that the alarm signal from the output of alarm signal amplification detection circuit is judged processing; If there is not illegal act, then be in signal always and judge state, judged whether to separate anti-order simultaneously, if separate anti-order, then the single-chip microcomputer central control circuit will be not to alarm signal react (unless the user deploys troops on garrison duty once more); If illegal act is arranged, then send alarm command (comprising warning object and alarm content) to alarm unit based on GSM MODEM from serial port; See Fig. 3, Fig. 8, Fig. 9 and Figure 10, random cipher and GSM mobile handset number storage unit mainly are made up of 24LC04 and peripheral circuit; Be used for storing the GSM mobile handset number of random cipher and setting, in outage, still can keep the information that sets; When powering up work again, do not reset random cipher and set the GSM mobile handset number, then the single-chip microcomputer central control circuit will be reused the information that be provided with last time; See Fig. 3, Fig. 4, Fig. 8, Fig. 9 and Figure 10, mainly form by GSM MODEM based on the alarm unit of GSM MODEM; Its major function is that the content of the operational order that sends according to the single-chip microcomputer central control circuit is sent and sent alarm command accordingly on the GSM mobile handset of corresponding warning object; Maybe send the command content of receiving to the single-chip microcomputer central control circuit; Its function is equivalent to the function of simple mobile phone basically; See Fig. 3, Fig. 4, Fig. 8, Fig. 9 and Figure 10, the basic functional principle of software is separated functions such as anti-and the order of deploying troops on garrison duty for realizing to the judgement of alarm command and operation, response, mainly shows in the judgement and corresponding operation and operation and response to GSM MODEM to the output of alarm signal amplification detection circuit.
The present invention is the locating alarm device of the antitheft and function Network Based of the random cipher of safe and reliable, stable performance, widely used a kind of motor vehicle.
Claims (9)
1, the locating alarm device of the antitheft and function Network Based of a kind of random cipher of motor vehicle comprises alarm signal amplification detection circuit, single-chip microcomputer central control circuit, encoding transmitting circuit and corresponding with it coding receiving circuit; Mobile telecom network and information system thereof can utilize the positioning function of the movable positioning system of mobile telecom network to realize detection and locating alarming to illegal act; It is characterized in that: encoding transmitting circuit can be arranged on the mobile phone, and encoding transmitting circuit can produce random cipher, and corresponding with it coding receiving circuit can receive and remember random cipher and warning object; Single-chip microcomputer central control circuit, coding receiving circuit and alarm signal amplification detection circuit can be arranged on the motor vehicle; Warning message by the single-chip microcomputer central control circuit can with mobile telecom network and the mutual UNICOM of information system thereof.
2, the locating alarm device of the antitheft and function Network Based of the random cipher of motor vehicle according to claim 1, it is characterized in that: can utilize the Internet and information system thereof, warning message by the single-chip microcomputer central control circuit and by mobile telecom network and information system thereof can with the Internet and the mutual UNICOM of information system thereof.
3, the locating alarm device of the antitheft and function Network Based of the random cipher of motor vehicle according to claim 1, it is characterized in that: the alarm signal amplification detection circuit can be connected on the electronics or electric wiring of motor vehicle.
4, the locating alarm device of the antitheft and function Network Based of the random cipher of motor vehicle according to claim 1 is characterized in that: the generation of warning message and transmission can utilize information system and the speech communication of mobile phone or the function of short message or multimedia message or digital fax of mobile telecom network; The generation of warning message and transmission can utilize information system and QQ or e-mail or virtual mobile phone or the warning on the net or other the multimedia function of the Internet.
5, the locating alarm device of the antitheft and function Network Based of the random cipher of motor vehicle according to claim 1, it is characterized in that: the movable positioning system of mobile telecom network and locating cellphone can be determined the place of warning substantially, setting accuracy is 1M to 50M in the urban district, and setting accuracy is 1M to 100M in the urban district in addition; And can utilize movable positioning system and the map data information of GIS (GIS-Geographic Information System) and the mutual UNICOM of GPS (global positioning system) of mobile telecom network, setting accuracy is 1M to 20M in the urban district, and setting accuracy is 1M to 50M in the urban district in addition; Therefore can be implemented in the monitoring and the tracking of nationwide.
6, the locating alarm device of the antitheft and function Network Based of the random cipher of motor vehicle according to claim 1 is characterized in that: can utilize the cell phone intelligent platform of the WindowsCE of Microsoft or WindowsMobile2003 operating system, maybe can utilize the cell phone intelligent platform of the Symbian operating system of Handspring, maybe can utilize the cell phone intelligent platform of the Palm operating system of Palm to realize the generation of warning message and transmission and reach mutual UNICOM with mobile telecom network and the Internet; Also can utilize fixing PSTN (traditional telephone communication network) thus the facsimile function of network and other traditional function are realized the transmission of warning message and are reached the mutual UNICOM with mobile telecom network and the Internet.
7, the locating alarm device of the antitheft and function Network Based of the random cipher of motor vehicle according to claim 1, it is characterized in that: this device is applicable to the information network system of GSM or CDMA or 3G or CDMAEX or WCDMA or CDMA1X or ATM or PSTN or IP phone or Personal Handyphone System or PSTN intelligent network or GSM intelligent network or CDMA intelligent network or NGN.
8, the locating alarm device of the antitheft and function Network Based of the random cipher of motor vehicle according to claim 1, it is characterized in that: the warning object can preestablish; The warning object that can be scheduled to can be mobile telecom network and information system thereof or the Internet and information system thereof or the fixing object of PSTN and information system thereof, and the warning object that can subscribe can have one to 100; Encoding transmitting circuit that can produce random cipher can corresponding one to 1,000 coding receiving circuit that can receive and remember random cipher and warning object; Coding receiving circuit can be accomplished only to receive and remember a random cipher.
9, the locating alarm device of the antitheft and function Network Based of the random cipher of motor vehicle according to claim 1, it is characterized in that: the alarm signal amplification detection circuit is made up of time-base circuit IC1 and peripheral circuit; Encoding transmitting circuit comprises random cipher encoder IC2 and modulation module I C3; Be arranged on four unlocking cipher input D1 on the random cipher encoder IC2, D2, D3, D4 and respectively with four unlocking cipher input D1, D2, D3, the corresponding unlocking cipher enter key of D4 S1, S2, S3, S4; Serial output terminal D0 on the random cipher encoder IC2 and modulation module I C3 link; Antenna TX1 and modulation module I C3 link; The coding receiving circuit comprises that random cipher decoder IC5 reaches and the corresponding modulation module I of modulation module I C3 C4; Antenna TX2 and modulation module I C4 link; The random cipher decoder IC5 that is connected with IC3, the OSC end that is arranged on the modulation module I C3 is formed clock oscillator RC jointly with resistance R 6, capacitor C3; Study input LRN1, study output LRN0 and decoding output D1 ' D2 ' D3 ' D4 ' are set on random cipher decoder IC5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100658296A CN1633058A (en) | 2004-12-21 | 2004-12-21 | Vehicle locating alarm device with random cipher theft proof capability and based on network function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100658296A CN1633058A (en) | 2004-12-21 | 2004-12-21 | Vehicle locating alarm device with random cipher theft proof capability and based on network function |
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| CN1633058A true CN1633058A (en) | 2005-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2004100658296A Pending CN1633058A (en) | 2004-12-21 | 2004-12-21 | Vehicle locating alarm device with random cipher theft proof capability and based on network function |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102259635A (en) * | 2010-05-26 | 2011-11-30 | 通用汽车有限责任公司 | Method of unauthorized vehicle movement detection |
| CN103287392A (en) * | 2013-04-16 | 2013-09-11 | 东北林业大学 | Novel anti-theft device for automobile |
| CN110505057A (en) * | 2019-08-16 | 2019-11-26 | 华东师范大学 | A kind of digital circuit generating random cipher |
-
2004
- 2004-12-21 CN CNA2004100658296A patent/CN1633058A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102259635A (en) * | 2010-05-26 | 2011-11-30 | 通用汽车有限责任公司 | Method of unauthorized vehicle movement detection |
| CN103287392A (en) * | 2013-04-16 | 2013-09-11 | 东北林业大学 | Novel anti-theft device for automobile |
| CN110505057A (en) * | 2019-08-16 | 2019-11-26 | 华东师范大学 | A kind of digital circuit generating random cipher |
| CN110505057B (en) * | 2019-08-16 | 2021-06-25 | 华东师范大学 | Digital circuit for generating random password |
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Open date: 20050629 |