[5099] in cryptography@c2.net mail archive
Re: Encrypting filenames
daemon@ATHENA.MIT.EDU (Frank O'Dwyer)
Mon Jul 12 10:24:13 1999
Date: Mon, 12 Jul 1999 14:46:12 +0100
From: "Frank O'Dwyer" <fod@brd.ie>
To: Steve Hawkinson <hawkinson@lcse.umn.edu>
Cc: cryptography@c2.net
Steve Hawkinson wrote:
> Also does anybody know of an encrypted filesystem that encrypts the names
> of files, besides CFS.
Presumably any UNIX style filesystem would automatically provide this,
since a directory is essentially a file. Some filesystems, however,
allow for renaming a file without changing the encryption key...I think
Windows 2000 EFS works like this, for example. It seems to me that this
may open up attacks against integrity, e.g. via a kind of replay attack
where old versions of encrypted files are reinstated.
Cheers,
Frank O'Dwyer.
