Storage device controlled access

Details Storage device controlled access Storage device controlled access

2006-06-07

2011-10-25

Parthasarathy, Pramila (Department: 2436)

Electrical computers and digital processing systems: support

Data processing protection using cryptography

By stored data protection

C713S189000, C726S026000, C726S027000, C726S031000

Reexamination Certificate

active

08046593

ABSTRACT:
Access to a storage device, such as a disk, is controlled by performing a disk operation using a single cryptographic engine. Keys associated with each layer of a layered structure associated with controlling access to the storage device are combined. The resultant of this combination is used as the key to the cryptographic engine. Data to be retrieved from and written to the storage device are operated on by the cryptographic engine utilizing the combined key. Keys are combined by combining functions associated with layers of the layered structure. A combining function can include an exclusive or function, a cryptographic hash function, or a combination thereof.

REFERENCES:
patent: 7162645 (2007-01-01), Iguchi et al.
patent: 7434069 (2008-10-01), Nessler
patent: 2005/0018472 (2005-01-01), Lim
U.S. Appl. No. 11/031,161, filed Jan. 7, 2005, Hunter, J. et al.
U.S. Appl. No. 11/035,715, filed Jan. 14, 2005, Hunter, J. et al.

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