SEMICONDUCTOR DEVICE, CONFIDENTIAL DATA CONTROL SYSTEM, CONFIDENTIAL DATA CONTROL METHOD
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United States of America Patent
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Issued Date -
Oct 17, 2013
app pub date -
Apr 12, 2013
filing date -
Apr 13, 2012
priority date (Note) -
Abandoned
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Abstract
A semiconductor device, confidential data control system and confidential data control method are provided capable of safeguarding confidential data even in cases of unauthorized access to a single storage medium. Capacities of each of confidential data segments, necessary when reading each of confidential data segments from an external memory and an internal memory, are acquired as control data from a register. Then each of the confidential data segments is read based on the acquired control data. It is accordingly rendered difficult to determine data related to the capacity of the confidential data even in cases of unauthorized access (hacking). Moreover, reading of the full confidential data does not occur even if unauthorized access to a single storage medium occurs (either the external memory or the internal memory). Consequently, unauthorized access can be suppressed.
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