A method and apparatus for managing encrypted data on a computer readable medium wherein an encryption key is determined for a received quantum of data. The quantum of data is encrypted according to the encryption key at a volume level when the quantum of data comprises volume data. The quantum of data is encrypted according to the encryption key at a file level when the data comprises file data. The encrypted data is then directed to a computer readable medium.

 
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> On-chip multi-core type tamper resistant microprocessor

> Circuitry and method for detecting and protecting against over-clocking attacks

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