Achieving strong cryptographic correlation between higher level semantic units and lower level components in a secure data storage system
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United States of America Patent
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May 22, 2012
Grant Date -
Dec 27, 2007
app pub date -
Jun 27, 2006
filing date -
Jun 27, 2006
priority date (Note) -
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Abstract
A data storage architecture for networked access by clients includes a file server capable of communication with the clients via the network, physical storage organized as a plurality of logical volumes, and an encryption device in communication with both the file server and the physical storage. The encryption device is operable in response to signaling from the file server, including an indication of a range of blocks of data, to cause encryption of the range of blocks with an encryption key that is unique within the physical storage. The encryption device includes nested tables mapping block ranges to encryption keys. Consequently, undesirable key sharing across files, file systems, and other units can be avoided down to the block level.
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