JP3403620B2 - Digital operation recording device security assurance method and system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mileage of a vehicle,
The present invention relates to a security assurance method and system for a digital operation recording device that collects and records operation data such as vehicle speed.

[0002]

2. Description of the Related Art A vehicle, such as an automobile, is equipped with a digital operation recording device as shown in FIG. 7. In this digital operation recording device, a memory card 103 is mounted on an in-vehicle device 101 at the time of leaving the vehicle and detected by a sensor. The vehicle-mounted device 101 automatically collects various operation data such as vehicle speed data, travel time data, travel distance data, and records the collected operation data in the memory card 103.

At the time of returning, the memory card 103 is removed from the vehicle-mounted device 101, and each operation data stored in the memory card 103 is read by the reader / writer 105.
Then, the operation data read by the personal computer 107 is analyzed and the analysis result is displayed on the display unit 109, or the analysis result is printed out on the printer 111. As a result, vehicle operation management and safety management can be performed.

In this case, the speed data is mainly recorded on the memory card, but if the speed data is left as it is, the memory capacity becomes enormous. Therefore, the daily speed data is compressed, and the speed compressed data is, for example, I only record for one week.

[0005]

However, since the memory card only records data mainly composed of speed-compressed data, the data recorded in the memory card cannot be correctly recorded by an authorized vehicle-mounted device. It was not possible to determine whether or not the data was valid.

The present invention provides a security assurance method for a digital operation recording device and a system therefor capable of discriminating whether or not the data recorded in a memory card is the data correctly recorded by an authorized vehicle-mounted device. Is an issue.

[0007]

The present invention adopts the following means in order to solve the above problems. According to the invention of a security assurance method for a digital operation recording device of claim 1, in the main body of the digital operation recording device for collecting operation data of a vehicle, the operation data is recorded in an operation record data area in a storage medium, and the storage medium is mounted. When a predetermined condition is satisfied, a part of the operation data is recorded as verification data in a verification data area in the storage medium, and a data analysis device for analyzing the operation data recorded in the storage medium is provided. Reading the collation data recorded in the collation data area in the storage medium, storing the read collation data in a storage device in advance, and collating the read collation data with the stored data stored in the storage device. However, if the collation data matches the stored data, the operation data recorded in the operation record data area in the storage medium is recorded. Is determined to be legitimate data, and if the collation data does not match the stored data, the operation data is determined to be incorrect data, so that the operation data recorded in the storage medium is correctly recorded by the legitimate digital operation recording device body. It is possible to determine whether the data is recorded data.

According to a second aspect of the present invention, the operation data is speed data of the vehicle, and compression processing is performed on the speed data, and the speed compression data is output to reduce the memory capacity of the card. be able to.

According to the third aspect of the present invention, when the collation data does not match the stored data, an error message is displayed, whereby a data abnormality can be known.

According to a fourth aspect of the present invention, each of the collation data and the stored data is a date, a personal code, and a part of the speed compression data of the speed compression data corresponding to the date and the personal code. In the data analysis device, the date in the verification data area, the personal code, and a part of the speed compression data are read out, and the part of the speed compression data corresponding to the date in the verification data area and the personal code read out is stored. It is possible to determine whether or not the speed compression data is correctly recorded by reading from the device and determining whether the speed compression data of a part of the collation data area matches the speed compression data of a part of the storage device.

According to a fifth aspect of the present invention, in the digital operation recording apparatus main body, counting is performed when the storage medium is mounted and is the first operation or when a predetermined time has elapsed after the storage medium was mounted. By updating the collation data recorded in the collation data area when the counted value reaches a predetermined update value, it becomes more difficult to falsify and reliability is improved.

According to a sixth aspect of the present invention, there is provided a digital operation recording device main body for collecting the operation data of the vehicle and recording it in a storage medium, and a data analysis device for analyzing the operation data recorded in the storage medium. The main body of the digital operation recording device records the operation data in an operation record data area in the storage medium, and when the storage medium is mounted and a predetermined condition is satisfied, the operation data is recorded in a verification data area in the storage medium. The data analysis apparatus has a recording control unit for recording a part of data as collation data, and the data analysis apparatus reads out the collation data recorded in the collation data area in the storage medium, and the reading apparatus reads the collation data. The storage device in which the collation data issued is stored in advance, and the collation data read by the reading device is compared with the storage data stored in the storage device. If the data collating unit and the collation data match the stored data, the operation data recorded in the operation record data area in the storage medium is determined to be regular data, and the collation data is stored in the stored data. And a data determination unit that determines the operation data to be incorrect data when they do not match.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a security assurance method for a digital operation recording apparatus and a system thereof according to the present invention will be described in detail below with reference to the drawings. FIG. 1 shows a configuration block diagram of an embodiment of a security assurance system for a digital operation recording apparatus. The security assurance system for a digital operation recording device shown in FIG. 1 includes an in-vehicle sensor 1, an in-vehicle device 3 that constitutes a digital operation recording device body that collects and records operation data from the in-vehicle sensor 1, and a data analysis device 5. Consists of

The on-vehicle sensor 1 is a traveling sensor for detecting the traveling distance of the vehicle, a speed sensor for detecting the vehicle speed of the vehicle, etc., and outputs the detected traveling distance data, speed data and the like to the on-vehicle device 3.

The in-vehicle device 3 automatically collects various data such as speed data and mileage data detected by the in-vehicle sensor 1 and records them in the card 36. The vehicle-mounted device 3 is a read-only memory (RO) capable of reading prestored data.
M) 32, random access memory (RAM) 33 capable of reading and writing data, display section 34, card 3
Input / output unit (I / O) 3 that controls data input / output with
7. A control unit 38 including a central processing unit (CPU) for controlling each of these units is provided.

The card 36 is a memory card such as an IC card, is configured to be attachable to and detachable from the vehicle-mounted device 3, and is mounted on the vehicle-mounted device 3 at the time of leaving the warehouse. The control unit 38 includes a compression processing unit 41 that compresses speed data input from the vehicle-mounted sensor 1 to create speed compressed data, and a recording control unit 43. The recording control unit 43 has an update counter 45 and a data updating unit 47.

As a method for creating the velocity compressed data, there are the following methods, for example. An allowable error range is calculated for each sampling speed value, and a straight line crossing this error range represents a speed within the error range. Therefore, by storing the length of the straight line as the number of samplings and storing the value of the end point of the straight line, the speed of the period covered by the straight line can be quantitatively managed. As a result, a large amount of information can be stored with a smaller amount of data, so that the data can be compressed to create velocity compressed data.

The display unit 34 displays speed compression data and the like. When a predetermined time elapses from the time when the card 36 recognizes that the card 36 is inserted in the in-vehicle apparatus 3, the recording control unit 43 stores a part of the speed compression data from the compression processing unit 41 (for example, 256 in the collation data area in the card 36). (Byte) is recorded as verification data.

FIG. 4 shows a storage map inside the card. The card 36 is provided with a management data area, data, an operation record data area, an option data area, and a verification data area. The management data area stores management data indicating the address of each data stored in the card 36. Daily operation speed compression data for one week is sequentially stored in the operation record data area.

The collation data area stores date data at the time of recording an operation, the driver's personal code, speed compression data for several minutes, an update timer in which an update initial value for updating the collation data is set, and a flag F. Has been done. Flag F
Is "1" when the card 36 is inserted into the in-vehicle device 3.
When the card 36 is not inserted into the in-vehicle apparatus 3, the card 36 is set to "0".

The recording control unit 43 reads the update timer value from the card 36 when the condition for the update timer decrement is satisfied. The update counter 45 decrements the update timer value by 1.

The data updating unit 47 determines whether or not the decremented update timer value is zero. If the updated timer value is zero, the speed update data of the day recorded in the operation record data area is determined. A part of the speed compression data is recorded in the collation data area, and the update timer value which is zero is rewritten to the data value of the lower 5 bits of the travel distance data.

The data analysis device 5 includes a data read / write unit 5
1, an input unit 52, a storage device 53, a display unit 54, a printer 56, a control unit 58 including a CPU, a data collating unit 59,
The data determining unit 60 is included. The data read / write unit 51 reads out collation data and speed compression data from the card 36 and writes data to the card 36. The input unit 52 inputs data and gives operation instructions.

The control unit 58 stores the collation data read by the data read / write unit 51 in the storage device 53 such as a hard disk. Further, the control unit 58 analyzes the daily speed compression data read by the data reading / writing unit 51. The storage device 53 stores verification data including date data, personal code data, and speed compression data for several minutes.

The display unit 54 displays the daily vehicle speed based on the compressed speed data analyzed by the control unit 58, and the printer 56 prints out the daily vehicle speed.

The data collating unit 59 refers to the storage device 53, reads out the speed compression data corresponding to the date data and the personal code data read out by the data reading / writing unit 51 from the storage device 53, and writes the data read-out data. It is determined whether or not the speed-compressed data for several minutes read by the inserting unit 51 matches the speed-compressed data of the storage device 53.

The data judging section 60 is comprised of the data reading / writing section 5
When the speed compression data for several minutes read by 1 matches the speed compression data of the storage device 3, it is determined that the daily speed compression data is regular data, and the speed compression data is compressed from the operation record data area of the card 36. Read the data.

The data judging section 60 is comprised of the data reading / writing section 5
If the speed compressed data for several minutes read by 1 does not match the speed compressed data of the storage device 3, the speed compressed data is regarded as invalid data and an error message is displayed on the display unit 5.
Display on 4.

Next, a security assurance method for a digital operation recording device realized by the security assurance system for a digital operation recording device of the present invention will be described. First, the operation of the vehicle-mounted device 2 will be described with reference to the flowchart of FIG. First, initialization processing such as time adjustment is performed (step S101), and it is determined whether or not the card 36 is inserted into a card insertion slot (not shown) (step S103).
When the card 36 is inserted, the flag F is read from the card 36 and it is determined whether the flag F for the first time is "1" (step S105).

If the flag F for the first time is not "1", after setting the flag F to "1" (step S107),
Outgoing processing is performed (step S109), and step S11
Proceed to the process of 1. In the shipping process, initial data such as the start time is written in the card 36, and the address in the card 36 to which the data should be written is determined. Note that step S
If the flag F is "1" in 105, the process immediately proceeds to step S111.

In step S111, the vehicle-mounted sensor 1
The speed data is collected from the card, the speed data is compressed by the compression processing unit 41 to create speed compressed data, and the created speed compressed data is recorded by the recording control unit 43.
Write to operation record data area 6 (step S11)
3).

Next, the collation data area writing process is performed (step S115). The collation data area writing process is performed by the recording control unit 43 according to the flowchart of FIG. First, it is determined whether or not the update timer decrement condition is satisfied (step S20).
1).

When the condition for the decrement of the update timer is satisfied, the card 36 is inserted into the vehicle-mounted device 3 and is the first operation, the card 36 is inserted into the vehicle-mounted device 3 and 24 hours have passed, etc. Is.

When the condition for decrementing the update timer is satisfied, the update timer value is read from the card 36, and the update counter 45 decrements the update timer value by 1 (step S203).

Next, the data updating unit 47 determines whether or not the update timer value is zero (step S205). If the update timer value is zero, the speed compression of the day recorded in the operation record data area is performed. Of the data (current day data), the first data of about 256 bytes, for example, is recorded in the collation data area (step S207). For example, date data, a personal code, and speed compression data for several minutes are recorded in the collation data area as shown in FIG.

Further, the update timer value which is zero is
The data value of the lower 5 bits of the mileage data is rewritten (step S209). In this case, the update timer value may be randomly updated within 32 days to update the collation data.

Therefore, every time the update timer value becomes zero,
The collation data is rewritten. In other words, it is not rewritten and saved until the update timer value becomes zero. By thus updating the collation data, it becomes more difficult to falsify and the reliability is improved.

When the above collation data area writing processing is completed, display processing is performed in step S117, and then clock processing is performed in step S119. In step S103, when the card 36 is not inserted in the in-vehicle apparatus 3, the flag F for the first time is set to "
It is set to 0 "(step S121).

By the above processing in the in-vehicle device 3, the speed compression data and the collation data are recorded in the card 36.

Next, the data analysis processing by the data analysis device 5 will be described with reference to FIGS. First, three menus of card read, floppy disk (FD) read, and form display are displayed on the display unit 54 of the data analysis device 5 (step S301). For each menu on the screen, for example, a menu button such as a touch panel may be used.

One menu is selected from these three menus (step S303). For example, when the card read menu is selected, the data of the card 36 is read (step S305). When the FD read menu is selected, the FD data is read (step S307). When the form display menu is selected, a form display process is performed (step S309).

Next, the read process of the card 36 will be described with reference to the flowchart of FIG. First, the data read / write unit 51 reads date data, personal code data, and speed compression data for several minutes from the collation data area of the card 36 (step S401).

The control unit 58 refers to the storage device 53,
Date data read by the data read / write unit 51,
The speed compression data corresponding to the personal code data is read from the storage device 53 (step S403).

Then, the data collating unit 59 determines whether or not the speed-compressed data for several minutes read by the data read / write unit 51 matches the speed-compressed data of the storage device 53 (step S405). If the speed compression data for several minutes read by the data read / write unit 51 matches the speed compression data of the storage device 3, the determining unit 60 determines that the daily speed compression data is regular data. The speed compression data is read from the operation record data area of the card 36 (step S407).

On the other hand, when the speed compression data for several minutes read by the data reading / writing unit 51 does not match the speed compression data of the storage device 3, the speed compression data is regarded as invalid data and an error message is displayed on the display unit 54. Is displayed (step S409).

As described above, according to the embodiment, a part of the velocity compression data is recorded on the card 36 as collation data,
Since the collation data is read from the card 36 and the collation data is collated with the stored data, whether the speed compression data recorded in the card 36 is correctly recorded by the legitimate vehicle-mounted device 3 or the speed compression data is illegal in the vehicle. It can be verified by the device 3 whether the data was recorded illegally.

If the collation data of the card 36 and the speed compression data stored in the storage device 53 match, the speed compression data is properly read by the data reading / writing unit 51. It is also possible to verify that the file is properly stored in the storage device 53.

The present invention is not limited to the above embodiment. In the embodiment, the lower 5 bits of the traveling distance are set as the update timer value, but the operating time or the like may be set as the update timer value.

Further, in the embodiment, the update timer value is set to a value other than zero, the update timer value is decremented by one, and when the value becomes zero, the collation data is updated. The value may be set to zero, the counter value may be incremented by one, and the collation data may be updated when the counter value reaches a predetermined update value.

[0050]

According to the present invention, the operation data is recorded in the operation record data area in the storage medium, and when the storage medium is mounted and a predetermined condition is satisfied, the operation data is stored in the verification data area in the storage medium. Part of the data is recorded as collation data, the collation data recorded in the collation data area in the storage medium is read, the read collation data is stored in the storage device in advance, and the read collation data is stored. It collates with the stored data stored in the device, and when the collated data matches the stored data, the operation data recorded in the operation record data area in the storage medium is determined to be regular data,
When the collation data does not match the stored data, the operation data is determined to be invalid data, thereby determining whether the operation data recorded in the storage medium is the data correctly recorded by the proper digital operation recording device body. be able to.

By compressing the speed data and outputting the speed compressed data, the memory capacity of the card can be reduced. Further, by displaying an error message when the collation data does not match the stored data, it is possible to know the data abnormality.

Further, the date in the collation data area, the personal code, and a part of the speed compression data are read out, and the portion of the speed compression data corresponding to the date in the verification data area and the personal code read out is read out from the storage device. By determining whether or not a part of the speed compression data in the collation data area matches a part of the speed compression data of the storage device, it is possible to determine whether or not the speed compression data is correctly recorded.

When the storage medium is mounted and the operation is the first time, or when a predetermined time has elapsed since the storage medium was mounted, counting is performed, and when the counted value reaches a predetermined update value, verification is performed. By updating the collation data recorded in the data area, tampering becomes more difficult and reliability is improved.

[Brief description of drawings]

FIG. 1 is a configuration block diagram showing an embodiment of a security assurance system for a digital operation recording apparatus of the present invention.

FIG. 2 is a flowchart showing a security guarantee method for a digital operation recording device.

FIG. 3 is a flowchart showing a collation data area writing process.

FIG. 4 is a diagram showing a storage map in a card.

FIG. 5 is a flowchart showing the operation of the data analysis device.

FIG. 6 is a flowchart showing a card reading process in the data analysis device.

FIG. 7 is a diagram showing an example of a conventional digital operation recording device.

[Explanation of symbols]

1 In-vehicle sensor 3 In-vehicle device 5 Data analysis device 32 ROM 33 RAM 34, 54 display 36 cards 37 I / O 38,58 Control unit 41 compression processing unit 43 recording control unit 45 update counter 47 Data update section 51 Data read / write section 52 Input section 53 Storage device 56 printer 59 Data collator 60 Data judgment section

Claims (10)

(57) [Claims] 1. A digital operation recording device body for collecting operation data of a vehicle, wherein the operation data is recorded in an operation record data area in a storage medium, and when the storage medium is mounted and a predetermined condition is satisfied, In a data analysis device for recording a part of the operation data as verification data in a verification data area in a storage medium and analyzing the operation data recorded in the storage medium, the data is recorded in a verification data area in the storage medium. The read collation data is read, the read collation data is stored in the storage device in advance, the read collation data is collated with the stored data stored in the storage device, and the collation data matches the stored data. In this case, the operation data recorded in the operation record data area in the storage medium is determined to be regular data, and the collation data is Security assurance method for digital operation recording apparatus characterized by determining the operation data fails to match the presence data and invalid data. 2. The digital operation recording apparatus according to claim 1, wherein the operation data is speed data of the vehicle, the speed data is compressed, and the speed compressed data is output. Security assurance method. 3. The security assurance method for a digital operation recording device according to claim 1, wherein an error message is displayed when the collation data does not match the stored data. 4. Each of the collation data and the stored data is a date, a personal code, and a part of the speed compression data of the speed compression data corresponding to the date and the personal code. Reading the date, the personal code and a part of the speed compression data in the verification data area, reading a part of the speed compression data corresponding to the date and the personal code in the read verification data area from the storage device, 4. The security assurance method for a digital operation recording device according to claim 2, wherein it is determined whether a part of the compressed speed data in the verification data area matches a part of the compressed speed data in the storage device. . 5. The digital operation recording device main body is counted when the storage medium is attached and the operation is the first time, or when a predetermined time has elapsed after the storage medium was attached, and the counted value is counted. 5. The security assurance method for a digital operation recording device according to claim 1, wherein the collation data recorded in the collation data area is updated when a predetermined update value is reached. 6. A digital operation recording device main body, comprising: a digital operation recording device main body for collecting vehicle operation data and recording it in a storage medium; and a data analysis device for analyzing the operation data recorded in the storage medium. Stores the operation data in an operation record data area in the storage medium, and when the storage medium is mounted and a predetermined condition is satisfied, a part of the operation data is stored in a verification data area in the storage medium. The data analysis device has a recording control unit for recording data as collation data, and the data analysis device reads out the collation data recorded in the collation data area in the storage medium, and the collation data read by the reading device. And a data reference for collating the verification data read by the reading device with the storage data stored in the storage device. Section, if the collation data matches the saved data, the operation data recorded in the operation record data area in the storage medium is determined to be regular data, and the collation data does not match the saved data. A security assurance system for a digital operation recording device, further comprising: a data determination unit that determines the operation data as illegal data. 7. The operation data is speed data of the vehicle, and includes a compression processing unit that performs compression processing on the speed data and outputs the obtained speed compression data to the recording control unit. The security assurance system for a digital operation recording device according to claim 6. 8. The security assurance system for a digital operation recording device according to claim 6, further comprising a display unit that displays an error message when the collation data does not match the stored data. 9. The data of each of the collation data and the stored data is a date, a personal code, and a part of the speed compression data of the speed compression data corresponding to the date and the personal code, and the reading device, The date, the personal code, and a part of the speed compression data in the verification data area are read out, and the data collating unit is a part of the speed compression corresponding to the date, the personal code in the verification data area read by the reading device. 9. The data is read from the storage device, and it is determined whether a part of the speed compression data of the collation data area matches a part of the speed compression data of the storage device. Security Guarantee System for Digital Operation Recorder. 10. The recording control unit counts when the storage medium is mounted and is the first operation, or when a predetermined time has elapsed since the storage medium was mounted, and a counting unit that counts by the counting unit. 10. A data update unit for updating the collation data recorded in the collation data area when the counted value reaches a predetermined update value, and the data update unit according to any one of claims 6 to 9. The security assurance system for the digital operation recording device described in the item.