| 摘要 |
<P>PROBLEM TO BE SOLVED: To specify a vehicle which has collected video data recorded in a drive recorder. <P>SOLUTION: When a drive recorder 1 stores video data recorded upon occurrence of an accident or the like in a recording medium, the drive recorder 1 generates the data hash value of video data to be written, an immobilizer ECU 2 generates an authentication hash value from the key ID and the data hash value of an automobile key 3 held in secret, and then the drive recorder 1 writes the video data to be written and the authentication hash value in the recording medium. The drive recorder 1 reads the authentication hash value from the recording medium later on, and transmits the authentication hash value and the data hash value to the immobilizer ECU 2. The immobilizer ECU 2 calculates the hash value from the key ID and the data hash value of the automobile key 3, and presumes that the video data in the recording medium has been recorded in the drive recorder 1 if the calculated hash value matches the authentication hash value. <P>COPYRIGHT: (C)2011,JPO&INPIT |
