Volatile device keys and applications thereof
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United States of America Patent
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Jul 21, 2009
Grant Date -
Sep 21, 2006
app pub date -
Nov 14, 2005
filing date -
Nov 12, 2004
priority date (Note) -
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Abstract
A key is determined from a volatile response using circuitry on the device. The volatile response depend on process variation in fabrication of the device. Error control data that depends on the first volatile response can be computed, stored externally to the device, and then used to generate the key using a volatile response using the circuit. Applications of volatile keys include authentication and rights management for content and software.
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