<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
</head>
<body bgcolor="#FFFFFF" text="#000000">
<p>Hi all, it seems that this answer wasn't delivered, I post it
again.</p>
<p>Thanks,</p>
<p>Camille.<br>
</p>
<div class="moz-forward-container"><br>
-------- Message transféré --------
<table class="moz-email-headers-table" border="0" cellpadding="0"
cellspacing="0">
<tbody>
<tr>
<th align="RIGHT" valign="BASELINE" nowrap="nowrap">Sujet :
</th>
<td>Re: [Cryptography] Checkoin: physical crypto-cash</td>
</tr>
<tr>
<th align="RIGHT" valign="BASELINE" nowrap="nowrap">Date : </th>
<td>Mon, 17 Jul 2017 01:19:13 +0200</td>
</tr>
<tr>
<th align="RIGHT" valign="BASELINE" nowrap="nowrap">De : </th>
<td>Camille Harang <a class="moz-txt-link-rfc2396E" href="mailto:mammique@garbure.org"><mammique@garbure.org></a></td>
</tr>
<tr>
<th align="RIGHT" valign="BASELINE" nowrap="nowrap">Pour : </th>
<td><a class="moz-txt-link-abbreviated" href="mailto:cryptography@metzdowd.com">cryptography@metzdowd.com</a><br>
</td>
</tr>
</tbody>
</table>
<br>
<br>
<meta content="text/html; charset=utf-8" http-equiv="Content-Type">
<div class="moz-cite-prefix">Hi Ray, thank you for your reply and
questions.<br>
<br>
All the techniques you talk about are great, they can be added
into the second layer of verification to enforce it. The cash
you are talking about had no intrinsic value while the one
proposed by Checkoin carries it inside the packaging, it is not
an arbitrary promise from a government, you have it in your hand
(cold storage crypto-wallet, gold nugget, etc.). The cash you
talk about is centralized, there is no economical freedom,
everyone is dependent of a central bank, with Checkoin anyone
can start to produce banknotes with intrinsic value, and anyone
on earth can accept them safely with one simple scan, even if
they see it for the first time. Cash is disappearing, banks and
governments are at war on cash, because they can track it, they
want everyone to use Visa and MasterCard, cash protects our
privacy, if governments kills cash, we'll have to produce our
own decentralized cash, here is the technology to do it.
Checkoin is not only about cash, but about many counterfeiting
use cases (medicine, rare stamps, organic seeds, artwork, etc.),
it provides them anti-counterfeiting capabilities at the same
time as it allows them to be used as a medium of exchange (like
cash, as the application displays their integrity along with
real-time marketplace value). These are not really more
expensive to produce than central banks' cash, not to say the
same (even microchips produced in large series can be very
cheap).<br>
<br>
Here is what I think about right now at the top of my head
regarding your question, does it answer it?<br>
<br>
Thanks again for taking the time to look at the project,<br>
<br>
Camille.<br>
<br>
<br>
Le 17/07/2017 à 00:12, Ray Dillinger a écrit :<br>
</div>
<blockquote
cite="mid:ce5c079d-616e-24ca-d85c-88b3b9f32827@sonic.net"
type="cite">
<pre wrap="">
If the anti-duplicating measures work, why are we assuming that they are
better than those already applied to cash?
Cash already has the anti-counterfeiting measures built into banknotes,
already including holograms and fine-detail-random images in some
countries, probably to include RFIDs and cryptographic
challenge/response if and when it becomes cost-effective.
Cash already has the way banks detect duplication by tracking serial
numbers on higher-denomination currency.
Cash has the "tattletail" code in printers that puts identifying marks
on pages so documents including counterfeits can be linked to the
printer that made them.
Cash has the code in scanners and printers that detects attempts to
print currency and smudges the copy (and may send encrypted packets to
interesting places if connected).
Cash has existing police forces all over the world who recognize it, who
understand what counterfeiting is and why it is bad.
Cash has entire populations of people who already know exactly how it
looks and feels and what weight and texture it has. The kid at the
fast-food place can routinely make a test with her eyes and fingertips
in a fraction of a second that a counterfeiter needs many weeks of work
to reliably overcome. You will never get a more reliable test that fast
and easy.
You're looking for physical tokens of value to circulate with
anti-duplication measures? The ratio of general effectiveness to very
low cost is set by cash. It's really very effective and very cheap to
produce and use, and will likely continue to take up new technology as
it becomes cost-effective. It will be hard to convince anyone you have
a better solution. It will be hard to build a better solution.
Bear
</pre>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
The cryptography mailing list
<a moz-do-not-send="true" class="moz-txt-link-abbreviated" href="mailto:cryptography@metzdowd.com">cryptography@metzdowd.com</a>
<a moz-do-not-send="true" class="moz-txt-link-freetext" href="http://www.metzdowd.com/mailman/listinfo/cryptography">http://www.metzdowd.com/mailman/listinfo/cryptography</a></pre>
</blockquote>
<p><br>
</p>
</div>
</body>
</html>