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Zerocoin Project
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<li><a href="index">Home</a></li><li><a href="people">People</a></li><li><a href="q_and_a">Q and A</a></li><li class="active"><a href="talks_and_press">Papers, Press, etc</a></li></ul>
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<h1>
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<img src="/media/images/zq_bw_72.png"/>erocoin Project
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<h3 id="zerocash-paper">Zerocash Paper</h3>
<h4 id="zerocash-decentralized-anonymous-payments-from-bitcoin">Zerocash: Decentralized Anonymous Payments from Bitcoin |</h4>
<h5 id="eli-ben-sasson-alessandro-chiesa-christina-garman-matthew-green">Eli Ben-Sasson Alessandro Chiesa Christina Garman Matthew Green</h5>
<h5 id="ian-miers-eran-tromer-madars-virza">Ian Miers Eran Tromer Madars Virza</h5>
<p><a href="http://www.ieee-security.org/TC/SP2014/">IEEE Symposium on Security and Privacy (Oakland) 2014</a>|<a href="http://zerocash-project.org/media/pdf/zerocash-oakland2014.pdf">PDF</a></p>
<blockquote>
<p>Bitcoin is the first digital currency to see widespread adoption. While payments are conducted between pseudonyms, Bitcoin cannot offer strong privacy guarantees: payment transactions are recorded in a public decentralized ledger, from which much information can be deduced. Zerocoin(Miers et al., IEEE S&P 2013) tackles some of these privacy issues by unlinking transactions from the payment’s origin. Yet, it still reveals payments’ destinations and amounts, and is limited in functionality.
In this paper, we construct a full-fledged ledger-based digital currency with strong privacy guarantees. Our results leverage recent advances in zero-knowledge Succinct Non-interactive ARguments of Knowledge (zk-SNARKs).
First, we formulate and construct decentralized anonymous payment schemes (DAP schemes). A DAP scheme enables users to directly pay each other privately: the corresponding transaction hides the payment’s origin, destination, and transferred amount. We provide formal definitions and proofs of the construction’s security.Second, we build Zerocash, a practical instantiation of our DAP scheme construction. In Zerocash, transactions are less than 1 kB and take under 6 ms to verify — orders of magnitude >more efficient than the less-anonymous Zerocoin and competitive with plain Bitcoin.</p>
</blockquote>
<h3 id="zerocoin-paper">Zerocoin Paper</h3>
<h4 id="zerocoin-anonymous-distributed-e-cash-from-bitcoin">Zerocoin: Anonymous Distributed E-Cash from Bitcoin</h4>
<h5 id="ian-miers-christina-garman-matthew-green-aviel-d-rubin">Ian Miers, Christina Garman, Matthew Green, Aviel D. Rubin</h5>
<p><a href="http://www.ieee-security.org/TC/SP2013/">IEEE Symposium on Security and Privacy (Oakland) 2013</a> | <a href="/media/pdf/ZerocoinOakland.pdf">PDF</a>| Abstract:</p>
<blockquote>
<p>Bitcoin is the first e-cash system to see widespread
adoption. While Bitcoin offers the potential for new types of
financial interaction, it has significant limitations regarding
privacy. Specifically, because the Bitcoin transaction log is
completely public, users’ privacy is protected only through
the use of pseudonyms. In this paper we propose Zerocoin, a
cryptographic extension to Bitcoin that augments the protocol
to allow for fully anonymous currency transactions. Our system
uses standard cryptographic assumptions and does not introduce
new trusted parties or otherwise change the security model of
Bitcoin. We detail Zerocoin’s cryptographic construction, its
integration into Bitcoin, and examine its performance both in
terms of computation and impact on the Bitcoin protocol.</p>
</blockquote>
<p>Zerocash Paper </p>
<h3 id="selected-press">Selected Press</h3>
<ul>
<li>
<p><a href="http://www.americanbanker.com/bankthink/feds-wrongly-demonize-privacy-in-liberty-reserve-case-1059468-1.html?zkPrintable=1&nopagination=1">Feds Wrongly Demonize Privacy in Liberty Reserve Case</a> </p>
<p>American Banker 5.30.2013 </p>
</li>
<li>
<p><a href="http://bits.blogs.nytimes.com/2013/05/29/bitcoin-is-not-anonymous-but-it-could-be/">Unlike Liberty Reserve, Bitcoin Is Not Anonymous — Yet</a></p>
<p>New York Times 5.29.2013</p>
</li>
<li>
<p><a href="http://www.forbes.com/sites/andygreenberg/2013/04/12/zerocoin-add-on-for-bitcoin-could-make-it-truly-anonymous-and-untraceable/" title="Forbes:Zerocoin' Add-on For Bitcoin Could Make It Truly Anonymous And Untraceable">‘Zerocoin’ Add-on For Bitcoin Could Make It Truly Anonymous And Untraceable</a></p>
<p>Forbes 4.12.2013 </p>
</li>
<li>
<p><a href="http://www.newscientist.com/blogs/onepercent/2013/03/bitcoin-zerocoin.html">Bitcoin add-on makes your virtual purchases private</a></p>
<p>Newscientist 3.13.2013 </p>
</li>
</ul>
<h3 id="talks">Talks</h3>
<ul>
<li>
<p>May 19, 2013: <em>Universal and affordable computational integrity</em></p>
<p>Given at <a href="http://www.bitcoin2013.com/">Bitcoin 2013</a> by Eli Ben-Sasson (<a href="https://www.youtube.com/watch?v=YRcPReUpkcU">video</a>).</p>
<p>The talk covers, at high level, the idea of “succinct” (short and easy-to-verify) proofs.</p>
</li>
<li>
<p>January 13, 2014: <em>Anonymizing Cryptocurrencies: How to make Bitcoin Anonymous</em></p>
<p>Given at the <a href="http://realworldcrypto.wordpress.com/">2014 Real-World Cryptography Workshop</a> by Matthew Green (<a href="https://www.youtube.com/watch?v=FXU65XsLiFk">video</a>).</p>
<p>The talk covers Zerocoin and (an early version of) Zerocash.</p>
</li>
<li>
<p>February 27, 2014: <em>Zerocash: Zerocoin meets SCIPR Lab</em></p>
<p>Given at the <a href="https://www.youtube.com/channel/UC58YJLWM7hsKUZOQtmAHcvQ">2014 Bitcoin Israel Conference</a> by Eli Ben-Sasson (<a href="https://www.youtube.com/watch?v=l7LSSE0bRRo&feature=youtu.be">video</a>).</p>
<p>The talk covers the Zerocash construction.</p>
</li>
<li>
<p>March 26, 2014: <em>Zerocash: מטבע דיגיטלי משמר פרטיות (Privacy-Preserving Digital Currency)</em></p>
<p>Given at the 2014 Israel Science Day by Eran Tromer.</p>
<p>A brief overview of Zerocash, in Hebrew, to the general public.</p>
</li>
<li>
<p>April 22, 2014: <em>Zerocash: Zerocoin meets SCIPR Lab</em></p>
<p>Given at the <a href="http://www.meetup.com/bitcoin-il/events/175678412/">Israel Bitcoin Foundation</a> by Eli Ben-Sasson (<a href="https://www.youtube.com/watch?v=YXazVMYkE1M&feature=youtu.be">video</a>).</p>
<p>The talk covers the Zerocash construction.</p>
</li>
<li>
<p>May 20, 2014: <em>Zerocash: Decentralized Anonymous Payments from Bitcoin</em></p>
<p>To be given at the <a href="http://www.ieee-security.org/TC/SP2014/">2014 IEEE Symposium on Security and Privacy</a>.</p>
<p>The short talk will cover the Zerocash system at a high level, from a technical perspective.</p>
</li>
<li>
<p>May 21, 2013 Ian Miers @ <a href="http://www.ieee-security.org/TC/SP2013/">IEEE Symposium on Security and Privacy</a>
Sadly no video as far as we know. Slides <a href="/media/slides/IEEESSP2013/zerocoin_oakland.key">KEYNOTE</a> | <a href="/media/slides/IEEESSP2013/zerocoin_oakland.pdf">PDF</a>| <a href="/media/slides/IEEESSP2013/zerocoin_oakland.ppt">POWERPOINT</a></p>
</li>
<li>
<p>May 19, 2013 Ian Miers @ <a href="http://www.bitcoin2013.com/">Bitcoin 2013</a>
Less technical version of the IEEE talk above. Slides <a href="/media/slides/bitcoin2013/zerocoin_bitcoin2013.key">KEYNOTE</a> | <a href="/media/slides/bitcoin2013/zerocoin_bitcoin2013.pdf">PDF</a>| <a href="/media/slides/bitcoin2013/zerocoin_bitcoin2013.ppt">POWERPOINT</a></p>
</li>
<li>
<p>May 4, 2013 Matthew Green @ <a href="http://research.microsoft.com/en-us/">Microsoft Research</a>
<a href="http://research.microsoft.com/apps/video/dl.aspx?id=192058">See</a> for video.
Slides <a href="/media/slides/msr4.24.2013/zerocoin_msr.key">KEYNOTE</a>| <a href="/media/slides/msr4.24.2013/zerocoin_msr.pdf">PDF</a> | <a href="/media/slides/msr4.24.2013/zerocoin_msr.ppt">POWERPOINT</a></p>
</li>
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<p>Created by <a href="http://hms.isi.jhu.edu/index.php/people/11.html">Ian Miers</a> <a href="https://twitter.com/imichaelmiers">@imichaelmiers</a></p>
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