Microprocessor using asynchronous public key decryption processing
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United States of America Patent
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Nov 14, 2006
Grant Date -
Aug 1, 2002
app pub date -
Jan 31, 2002
filing date -
Jan 31, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a microprocessor that internally has a microprocessor specific secret key, a key management unit is provided to carry out a key registration for reading out from an external memory a distribution key that is obtained in advance by encrypting the instruction key by using a public key corresponding to the secret key, decrypting the distribution key by using the secret key to obtain the instruction key, and registering the instruction key in correspondence to a specific program identifier for identifying the program into a key table, and to notify a completion of the key registration to the processor core asynchronously by interruption when the key registration is completed.
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