Secure key access with one-time programmable memory and applications thereof
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United States of America Patent
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Apr 19, 2016
Grant Date -
May 15, 2014
app pub date -
Oct 8, 2013
filing date -
Sep 5, 2008
priority date (Note) -
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Abstract
A device includes a key store memory that stores one or more cryptographic keys. A rule set memory stores a set of rules for accessing the cryptographic keys. A key store arbitration module grants access to the cryptographic keys in accordance with the set of rules. The device can be used in conjunction with a key ladder. The device can include a one-time programmable memory and a load module that transfers the cryptographic keys from the one one-time programmable memory to the key store memory and the set of rules to the rule set memory. A validation module can validate the cryptographic keys and the set of rules stored in the key store and rule set memories, based on a signature defined by a signature rule.
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