Invention Grant
- Patent Title: Method and apparatus for a secure and deduplicated write once read many virtual disk
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Application No.: US13866257Application Date: 2013-04-19
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Publication No.: US10320558B2Publication Date: 2019-06-11
- Inventor: David H Leventhal , Robert F Barnitt
- Applicant: David H Leventhal , Robert F Barnitt
- Applicant Address: US AZ Tucson
- Assignee: DARK SIGNAL RESEARCH, LLC
- Current Assignee: DARK SIGNAL RESEARCH, LLC
- Current Assignee Address: US AZ Tucson
- Agency: Haverstock & Owens LLP
- Agent Thomas B. Haverstock
- Main IPC: H04L9/08
- IPC: H04L9/08 ; H04L9/06 ; G06F12/14 ; G06F21/79

Abstract:
A method and apparatus is provided for the operation of a secure and deduplicated write once read many virtual disk which exceeds the write performance of traditional cryptographic methods. This is achieved through the utilization of a time-memory tradeoff via the empty space on a virtual disk at format time. Traditionally empty space is zeroed to indicate that data is not present. When implementing the apparatus, the empty space is filled with the output of a symmetric-key algorithm uniquely keyed for that specific disk. From an information theoretic point of view, the format operation stores cryptographically structured data, rather than purely redundant data, enabling the write operation that encodes data to be stored on the disk to operate without additional cryptographic computation. This reduced computation requirement for encoding enables the computation required deduplication to operate as if encoding was not being performed, resulting in a net throughput increase.
Public/Granted literature
- US20140157005A1 METHOD AND APPARATUS FOR A SECURE AND DEDUPLICATED WRITE ONCE READ MANY VIRTUAL DISK Public/Granted day:2014-06-05
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