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[liberationtech] [cryptography] - "The Beautiful & Secure Messenger"

Eugen Leitl eugen at
Mon Jul 15 06:30:47 PDT 2013

----- Forwarded message from ianG <iang at> -----

Date: Sat, 13 Jul 2013 13:17:22 +0300
From: ianG <iang at>
To: cryptography at
Subject: Re: [cryptography] [liberationtech] - "The Beautiful & Secure Messenger"
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:17.0) Gecko/20130620 Thunderbird/17.0.7

On 13/07/13 09:43 AM, Noon Silk wrote:

>  So what should everyone do?

Risk analysis.  Which starts with your business model.

What you do is go talk to your customers and figure out what happens
to them.  Formally, you would figure out the frequency of these
events, and multiply them by the damages.  Order them that way.
Concentrate on the top one first, munch your way down the list.

If you do this, in ordinary business, you will find that the NSA isn't
even on the list, unless for some reason you targetted some space that
they also targetted [0].

<advert> E.g, in my current business I'm dealing with savings for v.
poor women in Africa.  The threats that are hitting them are
shakedowns by police, government, scammers, banks, merchants, each
other, family, and self, not necessarily in the order we westerners
expect.  Sometimes with violence.  So those are the things I'm
building the system to protect against, which of course takes some
cryptography to preserve and lock down assets rather than hide them,
mixed with a lot of other things... your classic old 1990s CIA models
aren't going to help a lot here. </>


[0] jihadist websites, CAs and chat systems for Americans spring to mind.
cryptography mailing list
cryptography at

----- End forwarded message -----
Eugen* Leitl <a href="">leitl</a>
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