*BSD News Article 19470


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From: Matt Blaze <mab@research.att.com>
Subject: Encrypting File System (was Re: Compressing file system ?)
Organization: AT&T
Date: Fri, 13 Aug 1993 14:16:08 GMT
Message-ID: <mab.745251368@merckx>
Originator: mab@merckx
References: <23tr2j$3tt@europa.eng.gtefsd.com> <23tsn3$7e@Germany.EU.net> <1993Aug6.200839.9675@udel.edu> <24em6c$84@sylvester.cc.utexas.edu>
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vax@sylvester.cc.utexas.edu (Vax) writes:

>Since we are on the topic of new file systems, I was just wondering
>if anyone had considered an encrypting file system. 

I've built a unix encrypting file system as a user-level loopback NFS 
server.  Since the cost of the actual encryption dominates everything else,
the horrible interface that NFS provides for a local file system isn;t
as important as it would be for, say, a compression layer.

A paper on CFS (the Cryptographic File System) will be presented at
the Conference on Communications and Computing Security in November.
You can anon ftp a postscript preprint from research.att.com in the file
dist/mab/cfs.ps.

-matt