On 08/22/2017 10:55 AM, Eric Biggers wrote:

On Tue, Aug 22, 2017 at 10:22:30AM +0800, Anand Jain wrote:

quoted

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.

  Do you think if application does not keep the sensitive information in 
the file-name, would that remove the file-name from the list of items 
that should be protected ?

Thanks, Anand