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Disk sanitization using encryption

  • US 7,581,118 B2
  • Filed: 12/05/2005
  • Issued: 08/25/2009
  • Est. Priority Date: 12/14/2004
  • Status: Active Grant
First Claim
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1. A method of disk sanitization comprising:

  • encrypting data stored on a disk, including a set of blocks, by using a first encryption key; and

    in response to a request to delete the set of blocks,re-encrypting blocks stored on the disk other than the set of blocks, by using a second encryption key, and not re-encrypting the set of blocks; and

    deleting the first encryption key.

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