Cryptographic device having active clearing of memory regardless of state of external power
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United States of America Patent
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Jun 12, 2012
Grant Date -
Apr 29, 2010
app pub date -
Oct 24, 2008
filing date -
Oct 24, 2008
priority date (Note) -
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Abstract
A cryptographic device that will actively clear its memory even in the absence of external power when a security breach is detected is provided. The memory cell clusters of the cryptographic device are provided with an internal power source that provides sufficient energy for the memory cell clusters to perform a clearing operation. If the external power source for the memory is removed and a physical security breach is detected, the power from the internal power source will allow the memory cells to actively clear their contents, thereby rendering any attempt to obtain the contents of the memory cells fruitless.
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