Security and log structured file systems

Authors:
Tage Stabell-Kulø
Affiliations:
Department of Computer Science, University of Tromsø, Norway
Venue:
ACM SIGOPS Operating Systems Review
Year:
1997

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Abstract

A log structured file system (LFS) obtains its performance by refraining from seeking for blocks on the disk. Instead, new data is written into new blocks which is placed at the end of the log. This incurs a security issue by leaving data on disk that was supposed to be overwritten.To us, this shows how difficult it is for users concerned with their privacy, not to be lead astray. It also emphasizes how wide the gap is between an encryption channel and a user.