Disk drive comprising encryption circuitry selectively enabled by verifying a circuit that provides plaintext data
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United States of America Patent
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May 11, 2004
Grant Date -
N/A
app pub date -
Jan 28, 2000
filing date -
Jan 28, 2000
priority date (Note) -
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Abstract
A disk drive comprising a disk for storing encrypted data is disclosed. The disk drive comprises a first circuit for providing plaintext data to a second circuit. The second circuit comprises controllable encryption circuitry for encrypting the plaintext data into the encrypted data. The controllable encryption circuitry comprises a data input, an enable input, and a data output. The second circuit further comprises a plaintext input for providing the plaintext data to the data input, an encrypted text output for providing the encrypted data from the data output, and a first control input for receiving a first device authentication signal for authenticating the first circuit. The second circuit comprises a first verification circuit, responsive to the first device authentication signal, for producing a first verification signal for use in controlling the enable input of the encryption circuitry to enable the encryption circuitry to provide the encrypted data via the encrypted text output.
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