System and method for securely clearing secret data that remain in a computer system memory
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United States of America Patent
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Nov 13, 2012
Grant Date -
Sep 3, 2009
app pub date -
Mar 3, 2008
filing date -
Mar 3, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
A system, method, and program product is provided that initializes a counter maintained in a nonvolatile memory of a security module to an initialization value. The security module receives requests for a secret from requesters. The security module releases the secret to the requesters and the released secrets are stored in memory areas allocated to the requesters. A counter is incremented when the secret is released. Requestors send notifications to the security module indicating that the requestor has removed the secret from the requestor's memory area. The security module decrements the counter each time a notification is received. When the computer system is rebooted, if the counter is not at the initialization value, the system memory is scrubbed erasing any secrets that remain in memory.
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