<div dir="ltr"><div><div><div>*Spendid* work Andrew (and all the other authors). Well done.<br><br></div>This is a timely paper that deserves significantly wider circulation and comment. <br><br></div>FWIW, Joichi Ito, from the MIT media Lab, made reference to your work during yesterday's <a href="https://www.youtube.com/watch?v=lIgjogLipvk">MIT Bitcoin Expo </a>[@ 2:46:54]<br><br></div>p.<br><br></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Mar 4, 2015 at 11:28 PM, Mike Hearn <span dir="ltr"><<a href="mailto:mike@plan99.net" target="_blank">mike@plan99.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Nice, Andrew.<div><br></div><div>Just one minor point. SPV clients do not need to maintain an ever growing list of PoW solutions. BitcoinJ uses a ring buffer with 5000 headers and thus has O(1) disk usage. Re-orgs past the event horizon cannot be processed but are assumed to be sufficiently rare that manual intervention would be acceptable.</div></div><div class="HOEnZb"><div class="h5"><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Mar 2, 2015 at 8:48 AM, Andrew Miller <span dir="ltr"><<a href="mailto:amiller@cs.umd.edu" target="_blank">amiller@cs.umd.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">We (Joseph Bonneau, myself Arvind Narayanan, Jeremy Clark, Ed Felten,<br>
Josh Kroll -- from Stanford, Maryland, Concordia, Princeton) have<br>
written a “systemization” paper about Bitcoin-related research. It’s<br>
going to appear in the Oakland security conference later this year<br>
(IEEE Security and Privacy) but we wanted to announce a draft to this<br>
community ahead of time.<br>
<br>
<a href="http://www.jbonneau.com/doc/BMCNKF15-IEEESP-bitcoin.pdf" target="_blank">http://www.jbonneau.com/doc/BMCNKF15-IEEESP-bitcoin.pdf</a><br>
<br>
One of the main goals of our work is to build a bridge between the<br>
computer science research community and the cryptocurrency community.<br>
Many of the most interesting ideas and proposals for Bitcoin come from<br>
this mailing list and forums/wikis/irc channels, where many academic<br>
researchers simply don’t know to look! In fact, we started out by<br>
scraping all the interesting posts/articles we could find and trying<br>
to figure out how we could organize them. We hope our paper helps some<br>
of the best ideas and research questions from the Bitcoin community<br>
bubble up and inspires researchers to build on them.<br>
<br>
We didn’t limit our scope to Bitcoin, but we also decided not to<br>
provide a complete survey of altcoins and other next-generation<br>
cryptocurrency designs. Instead, we tried to explain all the<br>
dimensions along which these designs differ from Bitcoin.<br>
<br>
This effort has roughly been in progress over two years, though it<br>
stopped and restarted several times along the way.<br>
<br>
If anyone has comments or suggestions, we still have a week before the<br>
final version is due, and regardless we plan to continue updating our<br>
online version for the forseeable future.<br>
<br>
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