Computer product, recording medium, communications apparatus, and communications method
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United States of America Patent
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Dec 20, 2016
Grant Date -
Apr 23, 2015
app pub date -
Dec 24, 2014
filing date -
Dec 24, 2014
priority date (Note) -
Withdrawn
status (Latency Note)
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Abstract
Improvement of the security of communication is facilitated. A server receives from an on-vehicle device, encrypted data obtained by encrypting ECU information using key information (111-1#C), and identification information (112-1#C). Thereafter, the server determines from the identification information (112-1#C), whether identification information of a next key to be used after identification information (112-1) is stored. The server determines that the identification information of the next key to be used after the identification information (112-1) is not stored, and obtains key information (111-2#S) and identification information (112-2#S) to identify key information (111-2) as the next key. The server encrypts the key information (111-2#S) and the identification information (112-2#S) using key information (111-1#S), and transmits encrypted data and identification information (112-1#S) to the on-vehicle device.
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