Bug#910249: Bumping up encryption to AES-256 by default

[Jeremy Bicha]

On Wed, Oct 3, 2018 at 6:36 PM procmem <procmem at riseup.net> wrote:
> Package: gnome-disk-utility
> Version: all
> Severity: serious
>
> Hi. I noticed Gnome Disks uses AES-128 by default instead of AES-256
> like Debian does out of the box. Having 256 bit symmetric keys is good
> practice for long term security especially in a coming era of quantum
> computers. (Whether they materialize or not is deabatble but why not
> have a sufficient margin if it's easy enough?) It is also the
> recommended level by NIST.

Please report this issue to the GNOME Disks developers:
https://gitlab.gnome.org/GNOME/gnome-disk-utility/issues

>From what I can tell, Disks uses udisks2 which uses libblockdev. The
libblockdev default is 256 bits.

https://github.com/storaged-project/libblockdev/blob/master/src/plugins/crypto.h#L39

So I'm not sure if the libblockdev default should be changed or if
that's something that GNOME Disks is supposed to handle itself.

Thanks,
Jeremy Bicha