Scalable file system configured to make files permanently...

Details Scalable file system configured to make files permanently... Scalable file system configured to make files permanently...

2005-09-27

2010-10-12

Parthasarathy, Pramila (Department: 2436)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Security kernel or utility

C713S185000, C380S277000, C380S278000, C709S224000, C709S207000, C709S206000

Reexamination Certificate

active

07814318

ABSTRACT:
One embodiment of the present invention relates to a system for managing files which facilitates making the files permanently unreadable. During operation, the system maintains file-class keys at a file manager, wherein the file-class keys are associated with different classes of files. If a file belongs to a class of files, the system ensures that whenever the file is stored or updated in non-volatile storage that the file is encrypted with an associated key-manager-file-class key for the class of files. The system makes an entire class of files permanently unreadable by causing an associated key-manager-file-class key, which can be used to decrypt the class of files, to become permanently unreadable.

REFERENCES:
patent: 6134660 (2000-10-01), Boneh et al.
patent: 6405315 (2002-06-01), Burns et al.
patent: 7333616 (2008-02-01), Brettle et al.
patent: 2001/0019614 (2001-09-01), Madoukh
patent: 2002/0166053 (2002-11-01), Wilson
patent: 2002/0191797 (2002-12-01), Perlman
patent: 2005/0066174 (2005-03-01), Perlman
patent: 2005/0066175 (2005-03-01), Perlman
Publication: “A Revocable Backup System” By Boney and Lipton, In Proceedings 6thUSENIX Security Conference, pp. 91-96, 1996.

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