On Sun, Apr 27, 2014, at 17:05, [email protected] wrote:
> J.M. Porup:
> >> If I understand correctly, your problem could also be solved by
> >> having support for persistence from a separate device when running
> >> on DVD, and using the additional software feature. See
> >> https://labs.riseup.net/code/issues/5561.
> >
> > Persistance on a separate device would be a suboptimal solution. In
> > order to trust any program installed on a USB stick, I would have to
> > re- download and re-verify the .deb packages every time in order to
> > verify their integrity. Cryptographic tools bundled with TAILS on
> > DVD do not suffer from this vulnerability.
>
> Is you could use a combination of the APT Packages [1], APT Lists [2],
> and Additional software [3] persistence features then you would not
> have to download them each and they would be installed automatically
> every time.
>
> [1]:https://tails.boum.org/doc/first_steps/persistence/configure/#apt_packages
> [2]: https://tails.boum.org/doc/first_steps/persistence/configure/#apt_lists
> [3]:https://tails.boum.org/doc/first_steps/persistence/configure/#additional_software
>
> Note that the verification process involved in Debian when installing
> a packages uses OpenPGP and is exactly the same as the one we rely one
> while building our ISO images in the first place. So new packages
> shouldn't be considered as less authenticated that pre-installed
> packages (if your system hasn't be tempered with of course).

I thank you for investigating the problem, and suggesting this option.
Personally, though, I would not want to use cryptographic tools
installed on a USB stick. How can I be sure my USB has not been
tampered with?

As an aside, TAILS persistance strikes me as more of a bug than a
feature. I do not think it should be encouraged.

> > Even if none of these GUI implementations are (yet) suitable for
> > TAILS, it's still worth considering including 2FA command line
> > tools. For a very small amount of disk space, you can significantly
> > increase the security of those who know how to use oathtools.
>
> For me that goes very well into the kind of useful packages that
> the Additional software persistence feature is made for. But that
> cannot go into the official ISO image because they lack a proper
> GUI in Debian.
>
> Nonetheless, in order to get the opinion of more devs I created a
> Discuss ticket on Redmine:
>
> https://labs.riseup.net/code/issues/7128

thanks.
j
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