Message-ID: <5379FF38.4050909@certimix.com>
Date: Mon, 19 May 2014 09:55:20 -0300
From: Sergio Lerner <sergiolerner@certimix.com>
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To: Alex Kotenko <alexykot@gmail.com>, 
	bitcoin-development <bitcoin-development@lists.sourceforge.net>
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	<CALDj+Bbsb6JiLabTBx21k02dDvnmZZDCXmJ2mnh7DngBon202w@mail.gmail.com>
In-Reply-To: <CALDj+Bbsb6JiLabTBx21k02dDvnmZZDCXmJ2mnh7DngBon202w@mail.gmail.com>
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Subject: Re: [Bitcoin-development] Paper Currency
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Alex,

    I think that what you are talking about more or less something like
the Firmcoin

    Check: http://firmcoin.com/?p=92


On 18/05/2014 08:47 a.m., Alex Kotenko wrote:
>
>
> One problem we couldn't figure out here though - how to protect the
> notes from unauthorized redeem. Like if someone else tries to reach
> your wallet with his own NFC - how can we distinguish between
> deliberate redeem by owner and fraudulent redeem by anybody else with
> custom built long range NFC antenna? Any ideas?
>
>
The firmcoin has two capacitive buttons that you have to press in
sequence to redeem to coins. No long range antenna can do that.

Best regards,
 Sergio.

PS:   the device has patents pending

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    Alex,<br>
    <br>
    &nbsp;&nbsp;&nbsp; I think that what you are talking about more or less something
    like the Firmcoin<br>
    <br>
    &nbsp;&nbsp;&nbsp; Check: <a class="moz-txt-link-freetext" href="http://firmcoin.com/?p=92">http://firmcoin.com/?p=92</a><br>
    <br>
    <br>
    <div class="moz-cite-prefix">On 18/05/2014 08:47 a.m., Alex Kotenko
      wrote:<br>
    </div>
    <blockquote
cite="mid:CALDj+Bbsb6JiLabTBx21k02dDvnmZZDCXmJ2mnh7DngBon202w@mail.gmail.com"
      type="cite">
      <div dir="ltr">
        <div class="gmail_default" style="font-family:'courier
          new',monospace;color:rgb(0,51,0)"><br>
        </div>
        <div class="gmail_default" style="font-family:'courier
          new',monospace;color:rgb(0,51,0)"><br>
        </div>
        <div class="gmail_default" style="font-family:'courier
          new',monospace;color:rgb(0,51,0)">One problem we couldn't
          figure out here though - how to protect the notes from
          unauthorized&nbsp;redeem. Like if someone else tries to reach your
          wallet with his own NFC - how can we distinguish between
          deliberate redeem by owner and fraudulent redeem by anybody
          else with custom built long range&nbsp;NFC antenna? Any ideas?</div>
        <div class="gmail_default" style="font-family:'courier
          new',monospace;color:rgb(0,51,0)"><br>
        </div>
        <div class="gmail_default" style="font-family:'courier
          new',monospace;color:rgb(0,51,0)"><br>
        </div>
      </div>
    </blockquote>
    The firmcoin has two capacitive buttons that you have to press in
    sequence to redeem to coins. No long range antenna can do that.<br>
    <br>
    Best regards,<br>
    &nbsp;Sergio.<br>
    <br>
    PS: &nbsp; the device has patents pending
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