Electrical computers and digital processing systems: support – Data processing protection using cryptography – By stored data protection
Reexamination Certificate
2006-03-20
2010-12-07
Barron, Jr., Gilberto (Department: 2432)
Electrical computers and digital processing systems: support
Data processing protection using cryptography
By stored data protection
C713S165000
Reexamination Certificate
active
07849330
ABSTRACT:
When data is stored for a certain retention period, well prior to the expiration date, the storage controller starts encryption of data on a certain volume while ensuring data access from hosts, and repeats read and write of the data predefined number of times while also ensuring data access from hosts. When the expiration date is reached and if the encryption completes, the storage controller dispose of the encryption keys. Using this technique, one can reuse the volume for other purposes as soon as the expiration is reached. Because one can start this process even much earlier than the expiration date, one can balance the workload of the controller by scheduling the process in order to avoid the peak of the workload for the data disposal process. Also, it is possible to minimize the period to manage encryption keys which makes key management easier.
REFERENCES:
patent: 6112187 (2000-08-01), Fukawa
patent: 6304948 (2001-10-01), Motoyama et al.
patent: 7082536 (2006-07-01), Filipi-Martin et al.
patent: 7559088 (2009-07-01), Cohen et al.
patent: 2001/0032318 (2001-10-01), Yip et al.
patent: 2002/0057799 (2002-05-01), Kohno
patent: 2002/0069169 (2002-06-01), Sukeda et al.
patent: 2002/0099959 (2002-07-01), Redlich et al.
patent: 2002/0150245 (2002-10-01), Sugimoto et al.
patent: 2003/0101350 (2003-05-01), Takada et al.
patent: 2003/0115477 (2003-06-01), Baldwin et al.
patent: 2003/0163719 (2003-08-01), Ebihara
patent: 2005/0084102 (2005-04-01), Hollar
patent: 2005/0234949 (2005-10-01), Asano
patent: 2006/0236274 (2006-10-01), Baumgartner et al.
Gutmann, Peter, “Secure Deletion of Data from Magnetic and Solid-State Memory,”Sixth USENIX Security Symposium Proceedings, Jul. 22-25, 1996, San Jose, California. http://www.cs.auckland.ac.nz/˜pgut001/pubs/secure—del.html.
“NetApp-Decru Compliance Solutions, Advanced File Shredding and Security,” 2004, Decru, Inc. http://www.decru.com/partnership/pdf/NetAppDecruFileShredding.pdf.
“Decru Datafort™ Storage Security Appliances,” 2005, Decru, Inc. http://www.decru.com/products/datafort0.htm.
Barron Jr. Gilberto
Hitachi , Ltd.
Le David
Sughrue & Mion, PLLC
LandOfFree
Apparatus and method for secure data disposal does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for secure data disposal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for secure data disposal will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4238738