[Cryptography] How to prove Wikileaks' emails aren't altered

[Tom Mitchell]

On Sat, Oct 29, 2016 at 10:39 PM, Ray Dillinger <bear at sonic.net> wrote:

>
>
> On 10/29/2016 09:38 PM, John Gilmore wrote:
> >> The post office doesn't keep a copy of every piece of paper mail that
> >> passes through the system, after all.  People would be shocked and
> >> offended by the idea that it ought to.
> >
> > Prepare to be shocked and offended by the post-9/11 idiocy of government
> > bureaucrats:
>
> This is especially interesting in light of rules requiring the
> MAC address of network-capable devices to be printed on the
> outside of the packaging.  If they can get a device's MAC, they
> can review delivery records to see to whom that device was sent.
>

It might be interesting to begin communicating with QR codes on postcards.
Triple Rot13  to start.  Also attaching a image for email content.

Storing up to 4296 characters they are internationally standardised under
ISO 18004, so a QR code is a QR code all over the world.

For this group a 3x5 or 4x6 index card set can contain backups of keys.
Also pre-shared secrets between individuals.  4296 characters is enough
for interesting key lengths.   The back of business cards can carry
key checksums or the public key of a key pair.
Signatures on the cards... as a policy?

Printers know how to feed index cards and postcards.
Readers and scanners are common.

Key management tools where the loss of the key costs a lot has value.
</two_cents>

PS: the external printing of device MAC ID codes is an interesting twist
I had not heard of.


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  T o m    M i t c h e l l
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