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Date: Mon, 21 Aug 2017 19:55:45 -0700 From: Eric Biggers <ebiggers3@...il.com> To: Anand Jain <anand.jain@...cle.com> Cc: linux-fscrypt@...r.kernel.org, linux-doc@...r.kernel.org, linux-fsdevel@...r.kernel.org, linux-ext4@...r.kernel.org, "Theodore Y . Ts'o" <tytso@....edu>, Jaegeuk Kim <jaegeuk@...nel.org>, Richard Weinberger <richard@....at>, Michael Halcrow <mhalcrow@...gle.com>, Eric Biggers <ebiggers@...gle.com> Subject: Re: [PATCH] fscrypt: add a documentation file for filesystem-level encryption On Tue, Aug 22, 2017 at 10:22:30AM +0800, Anand Jain wrote: > > Hi Eric, > > How about a section on the threat model specific to the file-name ? > > (Sorry if I am missing something). > > Thanks, Anand It's already mentioned that filenames are encrypted: "fscrypt protects the confidentiality of file contents and filenames in the event of a single point-in-time permanent offline compromise of the block device content." There's not much more to it than that; all the other points in the "Threat model" section (offline manipulations, timing attacks, access control, key eviction, etc.) are essentially the same between contents and filenames encryption. Eric
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