REWRITE DETECTION SYSTEM AND INFORMATION PROCESSING DEVICE
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United States of America Patent
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Sep 11, 2015
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Sep 26, 2014
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Provided are a rewrite detection system and an information processing device capable of reducing communication traffic between devices and processing time in each device. A rewrite detecting device generates a random seed and transmits the random seed to an ECU, the ECU calculates a hash value using a predetermined hash function, and transmits the hash value to a rewrite detecting device. The ECU decides a storage region serving among storage regions of the storage unit, and calculates the hash value. The rewrite detecting device determines whether the hash value received from the ECU is right or wrong, and determines whether or not fraudulent rewrite has been performed. The ECU designates a storage region which is apart from a storage region used as a previous hash value calculation target by a predetermined address as a storage region of a current processing target.
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