KR20090013529A - Vehicle Information Safety Management System - Google Patents

Abstract

The present invention relates to a safety management system of vehicle information, by using the vehicle information management terminal to obtain the vehicle status information, fault code and identification code data of the vehicle to provide information on the vehicle status to the driver, It is transmitted to the vehicle information management server through, and the information of the vehicle is stored and managed using a weighted secret distribution method relates to a vehicle information safety management system to improve the stability and convenience.

The vehicle information safety management system of the present invention includes an OBD-II connector for outputting vehicle status information and a trouble code from an electronic control unit (ECU) of the vehicle; An RFID tag storing an identification code of the vehicle and mounted on the vehicle; Receives vehicle status information and fault code data from the OBD-II connector, obtains identification code data of the vehicle from the RFID tag through an RFID reader, processes it to be recognized by the user, and outputs it on a screen or voice. A vehicle information management terminal for transmitting the collected data; And a distributed information input / output module for inputting and outputting data received from the vehicle information management terminal, a vehicle information splitting module for secretly dividing the received data, a distributed information processing module for processing and storing the divided data, and the divided data. A vehicle information management server including a vehicle information recovery module for restoring data to original data; Characterized in that it comprises a.

Due to the above configuration, each vehicle can be identified online through the identification code stored in the RFID tag, and the problems of the vehicle can be quickly identified by using the vehicle's status information and fault code, and preventive maintenance is possible. It has the effect of preventing accidents.

In addition, the vehicle status information and fault codes are transmitted to the server based on the identification code of the vehicle, which makes the history management of the vehicle convenient and the vehicle information is stored and managed using a weighted secret distribution method. It is effective to prevent.

Description

Safety Management System of Vehicle Information

The present invention relates to a safety management system of vehicle information, by using the vehicle information management terminal to obtain the vehicle status information, fault code and identification code data of the vehicle to provide information on the vehicle status to the driver, It is transmitted to the vehicle information management server through, and the information of the vehicle is stored and managed using a weighted secret distribution method relates to a vehicle information safety management system to improve the stability and convenience.

Telematics, which has recently been gaining attention, is using a vehicle positioning technology and a system capable of two-way communication. Say. It is a compound word of telecommunication and Informatics. It is a fusion of technologies including wireless communication, computer, internet and multimedia industries. That is, it means automotive tele-information service (Automotive Tele-matics) that can send and receive various information in real time through mobile communication, the Internet, navigation. Through telematics service, users can identify and respond to various road traffic information, and can be provided with vehicle safety, security, diagnosis, communication, navigation, and even personalized information service (end-to-end). In order to provide such services, an information technology infrastructure that can maximize the efficiency of the transportation system must be the foundation. Such infrastructure is called an intelligent transport system (ITS). Intelligent traffic system is a technology that collects, manages and provides real-time traffic information by applying advanced technology to existing traffic system, maximizes the use efficiency of traffic facilities and improves the convenience of traffic use and traffic safety through the informatization of traffic sector. Accordingly, the general concept of telematics has a limited meaning as a communication service that supports accessing and utilizing various information in a vehicle. However, these concepts continue to be developed and expanded and reorganized into vehicle-type multimedia services using location information and wireless communication networks through convergence with other services.

In order to achieve such vehicle safety, security, diagnosis, communication, navigation, and personalized end-to-end, a large amount of data is exchanged between a server for providing a service and a vehicle using the same. As the use of information using the Internet increases, the information of vehicles stored in the information management server is exposed to malicious hacking.

As a countermeasure against this, a safe distributed storage management function of information is required. As a technical measure for safe storage management of vehicle information, it is possible to securely store personal information by maintaining confidentiality by secret sharing technology, and weaknesses in encryption and digital signature that may be decrypted over time. In order to overcome this problem and safely handle long-term storage at low cost, distributed and storage functions are required.

An object of the present invention is a safety management system of vehicle information to prevent leakage and forgery of data by storing and managing the important state information of the vehicle, the fault code and the identification code data of the vehicle in a server using a secret distribution method to which weights are applied. In providing.

The vehicle information safety management system of the present invention includes an OBD-II connector for outputting vehicle status information and a trouble code from an electronic control unit (ECU) of the vehicle; An RFID tag storing an identification code of the vehicle and mounted on the vehicle; Receives vehicle status information and fault code data from the OBD-II connector, obtains identification code data of the vehicle from the RFID tag through an RFID reader, processes it to be recognized by the user, and outputs it on a screen or voice. A vehicle information management terminal for transmitting the collected data; And a distributed information input / output module for inputting and outputting data received from the vehicle information management terminal, a vehicle information splitting module for secretly dividing the received data, a distributed information processing module for processing and storing the divided data, and the divided data. A vehicle information management server including a vehicle information recovery module for restoring data to original data; Characterized in that it comprises a.

The vehicle information management terminal transmits data wirelessly using a wireless communication module, and the transmitted data is received by a vehicle information management server connected to the Internet through a GPRS network.

The vehicle information management terminal is characterized in that to obtain data from the OBD-II connector through the CAN or K-Line protocol.

The vehicle information dividing module of the vehicle information management server determines the number of divisions n of the data O in order to divide the received data O according to a predetermined algorithm, and assigns a weight W to each of the divided values. After determining the weight-table (w-table), convert the data (O) to binary (O ₂ ), set the buffer value according to the value of the weight-table (w-table) and calculate the threshold value, in as much as the threshold (t) the data to match the original value (O ₂₎ is inserted for each of the buffer and the other buffer in the original value (O ₂₎ and is another data is inserted, a unique number for each secret piece ( The entire secret piece set L _n is obtained by acquiring data in the order of nid).

The vehicle information recovery module of the vehicle information management server obtains the size of the entire buffer by using the collected secret pieces (L _k ) and the weight-table (w-table), and calculates the weight of the weight-table (w-table). Comparing the sum of the product of each weight (W) and each element to obtain a result value, and converts the result value to a decimal number to recover the original data (O).

(nid: 각 비밀 조 각에 대한 고유번호)이며, 차량정보 복구모듈(44)의 버퍼값은

이고, 상기 차량정보 분할모듈(42) 및 차량정보 복구모듈(44)에서 쓰이는 임계값은

인 것을 특징으로 한다.The buffer value of the vehicle information dividing module 42 is

(nid: unique number for each secret piece), and the buffer value of the vehicle information recovery module 44 is

The threshold values used in the vehicle information splitting module 42 and the vehicle information recovering module 44 are

It is characterized by that.

Due to the above configuration, each vehicle can be identified online through the identification code stored in the RFID tag, and the problems of the vehicle can be quickly identified by using the vehicle's status information and fault code, and preventive maintenance is possible. It is effective in preventing accidents.

In addition, the vehicle status information and fault codes are transmitted to the server based on the identification code of the vehicle, which makes the history management of the vehicle convenient and the vehicle information is stored and managed using a weighted secret distribution method. It is effective to prevent.

Hereinafter, the safety management system of the vehicle information of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the vehicle information safety management system of the present invention includes an OBD-II connector 10 which outputs vehicle status information and a fault code from an electronic control unit (ECU) of a vehicle; An RFID tag 20 that stores an identification code of the vehicle and is mounted on the vehicle; Receives vehicle status information and fault code data from the OBD-II connector 10, obtains identification code data of the vehicle from the RFID tag 20 through an RFID reader, and processes them to be recognized by a user. A vehicle information management terminal 30 which outputs the data and transmits the processed data; And a distributed information input / output module (41) through which data received from the vehicle information management terminal (30) is inputted and outputted, a vehicle information dividing module (42) where secret division of the received data is performed, and the divided data is processed and stored. A vehicle information management server 40 including an information processing module 43 and a vehicle information recovery module 44 in which the divided data is restored to original data; Is made of.

On-Board Diagnosis (OBD-II) is one of the regulations on automobile emissions in the United States. It is a computer built into the vehicle that diagnoses a failure control part or system while the vehicle is in operation. Code that saves the code and turns on the Malfunction Indicator Light (MIL). Existing OBD systems that are applied for the first time only check the electronic parts and wiring, etc., so that the exhaust gas increases due to deterioration of catalyst or oxygen sensor, abnormal start of sensor or actuator, etc. The standards of lighting and stored information of connectors, fault codes, and warning lights have not been standardized, so different vehicles and manufacturers need different connectors, and different data must be provided to interpret fault codes. It was.

In order to solve these problems, the terms and fault codes of general-purpose diagnostic equipment connection connectors and communication specification electronic control parts should be used as standardized ones, and failure criteria and diagnostic requirements will be added for each item to which emissions will be increased. The revised version is the OBD-II Act.

Diagnosis items according to OBD-II regulations include catalysts, engine burns, fuel gauges, coolant coolant leaks, evaporative gas leaks, oxygen sensors, EGR, thermostats, positive crankcase ventilation (PCV) valves, and other engine or transmission controls. All sensors and solenoids used for diagnosis are included.

The OBD-II connector 10 satisfying the above regulations is generally installed at the bottom of the driver's seat of the vehicle and communicates with the vehicle information management terminal 30 through a CAN or K-Line protocol using a cable of a predetermined standard. . After the start of the vehicle is detected, the vehicle state information and the fault code are input to the vehicle information management terminal 30 in real time through the OBD-II connector 10, and the vehicle information management terminal 30 calculates and processes the vehicle information. The driver outputs the screen or voice to recognize it. As shown in FIG. 2, the state information of the vehicle includes information such as tire air pressure, transmission oil temperature, coolant temperature, battery voltage, and the like, when an abnormality occurs in any part of the vehicle while driving the OBD-II connector 10. Fault code is outputted through the vehicle information management terminal 30 interprets it and outputs the cause of the fault and the countermeasure through a voice or a screen so that the driver is aware of the accident.

RFID is an Automatic Data Collection (ADC) technology that uses radio frequencies to communicate data between a moving object (for recognition, tracking, and classification purposes) and a recognizer. RFID is fast, reliable, unexposed and hidden, allowing communication even while on the go. In addition, unlike barcodes, there is no need to scan closely for recognition, and it is free to change and add data of tags, and it is possible to read a large number of tags at once, and to read in harsh environments such as cold, hot, moisture, dust, and heat. This is high. In addition, RFID tag (Tag) has the advantage that can not be forged, semi-permanent, reusable.

A unique ID (ID) or an identification code assigned to each vehicle is stored in the RFID tag 20 as described above and attached to the vehicle, and by using an RFID reader of the vehicle information management terminal 30. The identification code is read to identify the vehicle. The RFID tag 20 can be passive or active, but since the vehicle can always receive power from the battery, it is recommended that the RFID tag 20 be recognized even from a distance. When the identification information of the vehicle is assigned to the vehicle information management terminal 30 itself, when the vehicle information management terminal 30 is moved to another vehicle, the vehicle information management terminal 30 outputs the identification code of the conventional vehicle. When the vehicle information is transmitted to the server, the information of the different vehicles is added together, and thus, even when a serious vehicle failure occurs, the vehicle cannot be managed. In order to prevent this, the RFID tag 20 is preferably mounted directly on the vehicle.

The data input to the vehicle information management terminal 30 not only enables the driver to recognize the voice or the screen but is also transmitted to the vehicle information management server 40 connected to the Internet through the GPRS network using a wireless communication module. The GPRS network is a 2.5G mobile phone capable of high speed internet and some video communication, unlike mobile phones that only send and receive voice. Since its debut in 1999, the GPRS network is in the middle of the existing 2G mobile phone and 3G technology, IMT-2000. This technology is called 2.5G mobile communication technology. Since it is designed for data transmission based on high speed, the transmission speed is 10 times faster than the existing 2nd generation mobile phone. This is possible, and users have many advantages, such as paying according to the amount of transmission rather than connection time.

As shown in FIG. 3, data of a vehicle transmitted through the GPRS network is input to a vehicle information management server 40, and distributed information in which data received from the vehicle information management terminal 30 is input and output. The input / output module 41, the vehicle information dividing module 42 in which the received data is secretly divided, the distributed information processing module 43 in which the divided data is processed and stored, and the divided data are restored to the original data. I / O and distributed storage of data are performed through the vehicle information recovery module 44.

Hereinafter, a secret dispersion method having a weight-table in the vehicle information splitting module 42 and the vehicle information recovering module 44 will be described in detail by way of example.

First, the term used in the secret dispersion method with weight-table is explained as follows.

W (Weight): the visibility of the data, that is, the secret piece weight

w-table: set of full weights, weight-table

O (Original data): original data

L: Sum of Secret Pieces

nid (Number ID): Unique number for each secret piece

k: Secret fragments collected during recovery

b: number of storage spaces

bid: a unique number for each storage space (B _nid : secret piece B with the unique number of nid)

S: secret piece (S _nid : secret piece with the unique number of nid)

n: number of divisions of secret information

, nid는 각 비밀 조각에 대한 고유번호)을 설정하고 임계값(

)을 계산하여, 각각의 버퍼에 대하여 임계값(t)만큼에는 원본값(O₂)과 일치하는 데이터가 삽입되고 나머지 버퍼에는 원본값(O₂)과 다른 데이터가 삽입되며, 각 비밀 조각에 대한 고유번호(nid)의 순서대로 데이터를 취득하여 전체 비밀조각 집합(L_n)을 획득하게 된다.The vehicle information dividing module 42 of the vehicle information management server 40 determines the number of divisions n of the data O in order to divide the received data O according to a predetermined algorithm, and weights each of the divided values. After giving (W) to determine the weight-table (w-table), convert the data (O) to binary (O ₂ ), according to the value of the weight-table (w-table) buffer value (

, nid sets a unique number for each secret piece, and sets the threshold (

), Data corresponding to the original value (O ₂ ) is inserted into each buffer by the threshold value (t) for each buffer, and data different from the original value (O ₂ ) is inserted into the remaining buffers. Data is obtained in the order of a unique number (nid) for the entire secret piece set (L _n ).

)를 구하고, 가중치-테이블(w-table)의 각 가중치(W)와 각 원소의 곱에 대한 합을 비교하여 결과값를 구하고, 결과값을 10진수로 변환하여 원래의 데이터(O)로 복구하게 된다.The vehicle information recovery module 44 of the vehicle information management server 40 uses the set of collected secret pieces (L _k ) and a weight-table (w-table) to determine the size of the entire buffer (

), Compare the sum of each weight (W) of the weight-table (w-table) with the product of each element to obtain a result, and convert the result to a decimal number to recover the original data (O). do.

First of all, an example of data segmentation method is to divide the original data into a vehicle diagnostic code number 7342 and divide it into five secret pieces. In addition, each of the five secret pieces is given a weight as shown in Table 1, and the weight is designated as an integer, which is recorded as a weight-table.

TABLE 1

Explanation nid Weight Secret piece A One 3 Secret piece B 2 2 Secret piece C 3 One Secret piece D 4 One Secret Shard E 5 One

First, the original data, 7342, is changed to binary. That is, 7342 is converted into 1110010101110.

)을 설정하고 임계값(

)을 계산한다. 버퍼값은

과 같이 계산할 수 있으며, 생성되는 버퍼는 <표 2>와 같다.The buffer value according to the value of the weight-table of Table 1

) And the threshold (

Calculate The buffer value is

It can be calculated as shown in <Table 2>.

TABLE 2

buffer B1 B2 B3 B4 B5 B6 B7 B8 S _nid S1 S1 S1 S2 S2 S3 S4 S5

이다.Threshold is

to be.

The entry of data into each buffer is performed as follows. In the above, a total of eight buffers were generated for secret dispersion, and the threshold value was set to five. Here, t, that is, five stores should be inputted with the same data as the original, and the rest of the stores should be inputted with data different from the original. It is as follows.

The layout of the data is random, but the storage sharing the nid should store the same data. Table 3 shows the divided data.

TABLE 3

Next, the data is obtained in the order of nid, and the total secret fragment set L is obtained. The result is shown in Table 4.

TABLE 4

This allows five people to share the final acquisition data, where the data from S1 and S2 out of five people will be taken by the primary vehicle server administrator, as specified in the initial weight here. In addition, even if one data is lost among S3, S4 and S5, the original data can be completely recovered.

The restore operation can be performed as an inverse concept of the data partitioning procedure, but in practice the restoration procedure is much simpler than the creation procedure. Restoration requires data to be restored and a weight-table. The weight-table is like a key in cryptography and cannot be restored without it.

First, data to be restored is collected and the collected data are shown in Table 5. Here, it is assumed that S5 has not been collected.

TABLE 5

Based on the collected data, we first determine the size of the entire buffer.

즉, 여기서는 3+2+1+1로 b의 값은 7이 된다.

In other words, here 3 + 2 + 1 + 1 and the value of b becomes 7.

The buffer created for secret recovery is shown in Table 6.

TABLE 6

B1 B2 B3 B4 B5 B6 B7 S1 S1 S1 S2 S2 S3 S4

Next, compare the sum of the weights and the product of each element to find the result.

이다.The original data is

to be.

로서 4이다. 전체 복구 과정은 <표 7>과 같다.For example, the first source data

4 as. The entire recovery process is shown in Table 7.

TABLE 7

The data is converted to a decimal number and restored to the original data. That is, it is possible to recover 7342 through 1110010101110.

The existing proposed threshold secret dispersion method (Shamir [Shamir, 1979]) cannot restore partial information once it has been restored, and the number of functions for secret dispersion is continuously increasing, which limits the processing of large data. The method used in the present invention can be applied to a large amount of data because it is possible to perform a high-speed operation processing only by collecting data and simple calculation.

The present invention is not limited to the above-described embodiments, and the scope of application is not limited, and various modifications can be made without departing from the gist of the present invention as claimed in the claims.

1 is a conceptual diagram of a safety management system of vehicle information of the present invention.

Figure 2 is an embodiment of a vehicle information management terminal is displayed the information of the vehicle.

3 is a conceptual diagram of a vehicle information management server.

** Description of the symbols for the main parts of the drawings **

10: OBD-Ⅱ Connector 20: RFID Tag

30: vehicle information management terminal 40: vehicle information management server

41: distributed information input / output module 42: vehicle information splitting module

43: distributed information processing module 44: vehicle information recovery module

Claims (6)

An OBD-II connector 10 for outputting vehicle status information and a trouble code from an electronic control unit (ECU) of the vehicle; An RFID tag 20 that stores an identification code of the vehicle and is mounted on the vehicle; Receives vehicle status information and fault code data from the OBD-II connector 10, obtains identification code data of the vehicle from the RFID tag 20 through an RFID reader, and processes them to be recognized by a user. A vehicle information management terminal 30 which outputs the data and transmits the processed data; And The distributed information input / output module 41 in which the data received from the vehicle information management terminal 30 is input and output, the vehicle information dividing module 42 in which the received data is secretly divided, and the divided data is processed and stored. A vehicle information management server 40 including a distributed information processing module 43 and a vehicle information recovery module 44 in which the divided data is restored to original data; Vehicle safety management system comprising a. The method of claim 1, The vehicle information management terminal 30 transmits data wirelessly using a wireless communication module, and the transmitted data is transmitted to the server 40 connected to the Internet through a GPRS network. Management system. The method of claim 2, The vehicle information management terminal (30) is a vehicle information safety management system, characterized in that to obtain data from the OBD-II connector (10) through the CAN or K-Line protocol. The method of claim 1, The vehicle information dividing module 42 of the vehicle information management server 40 determines the number of divisions n of the data O in order to divide the received data O according to a predetermined algorithm, and weights each of the divided values. After assigning (W) to determine the weight-table (w-table), convert the data (O) to binary (O ₂ ), and set the buffer value according to the value of the weight-table (w-table) By calculating the threshold values, data corresponding to the original value (O ₂ ) is inserted into each buffer by the threshold value (t), and data different from the original value (O ₂ ) is inserted into the remaining buffers. And a total secret piece set (L _n ) by acquiring data in the order of a unique number (nid) for the vehicle information safety management system. The method of claim 4, wherein The vehicle information recovery module 44 of the vehicle information management server 40 obtains the size of the entire buffer by using the set of collected secret pieces L _k and a weight table (w-table), and calculates the weight table. A vehicle characterized by comparing the sum of each weight (W) of the (w-table) and the product of each element to obtain a result value, converting the result value into a decimal number and recovering the original data (O). Information safety management system. The method according to claim 4 or 5, The buffer value of the vehicle information dividing module 42 is

(nid: unique number for each secret piece), and the buffer value of the vehicle information recovery module 44 is

The threshold values used in the vehicle information splitting module 42 and the vehicle information recovering module 44 are

Vehicle safety management system, characterized in that.

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