System and method for preventing differential power analysis attacks (DPA) on a cryptographic device
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United States of America Patent
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Jul 20, 2004
Grant Date -
N/A
app pub date -
Dec 9, 1999
filing date -
Dec 9, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
System and method for performing cryptographic operations include providing at least one processor for performing cryptographic operations, memory coupled to the processor for use in performing the cryptographic operations; and a storage component coupled to the processor for storing and retrieving information calculated and used in the cryptographic operation. The processor, memory and storage component are securely enclosed whereby direct access to the cryptographic operations is prevented. A power source, which is external to the secure enclosure, is coupled to and supplies power to the processor, the memory and the storage component. Circuitry within the enclosure maintains a constant power drain on the power source.
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