Microprocessor configuration and method for operating a microprocessor configuration
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Apr 28, 2009
Grant Date -
Jan 2, 2003
app pub date -
Jul 18, 2002
filing date -
Jan 18, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
In a microprocessor configuration, data is temporarily stored in a cache memory or a register bank. A respectively assigned cryptographic unit ensures that the data is encrypted or decrypted when the cache memory or the register bank is accessed. The keyword which is used here is changed if the cache memory or the register no longer contains any valid data to be read out. As a result, an increased protection is obtained against unauthorized monitoring of data and program sequences.
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