<oembed><type>rich</type><version>1.0</version><author_name>npub10tqt6wdc2neye0cxwyphtre6n5uccgur94khtqjdry9wxhrvywlq6w9uu9</author_name><author_url>https://nostr.ae/npub10tqt6wdc2neye0cxwyphtre6n5uccgur94khtqjdry9wxhrvywlq6w9uu9</author_url><provider_name>njump</provider_name><provider_url>https://nostr.ae</provider_url><html>📅 Original date posted:2017-11-06&#xA;📝 Original message:+1 to all of Peter Todd&#39;s comments&#xA;&#xA;On Nov 6, 2017 11:50 AM, &#34;Peter Todd via bitcoin-dev&#34; &lt;&#xA;bitcoin-dev at lists.linuxfoundation.org&gt; wrote:&#xA;&#xA;&gt; On Wed, Nov 01, 2017 at 05:48:27AM +0000, Devrandom via bitcoin-dev wrote:&#xA;&gt;&#xA;&gt; Some quick thoughts...&#xA;&gt;&#xA;&gt; &gt; Hi all,&#xA;&gt; &gt;&#xA;&gt; &gt; Feedback is welcome on the draft below.  In particular, I want to see if&#xA;&gt; &gt; there is interest in further development of the idea and also interested&#xA;&gt; in&#xA;&gt; &gt; any attack vectors or undesirable dynamics.&#xA;&gt; &gt;&#xA;&gt; &gt; (Formatted version available here:&#xA;&gt; &gt; https://github.com/devrandom/btc-papers/blob/master/aux-pow.md )&#xA;&gt; &gt;&#xA;&gt; &gt; # Soft-fork Introduction of a New POW&#xA;&gt;&#xA;&gt; First of all, I don&#39;t think you can really call this a soft-fork; I&#39;d call&#xA;&gt; it a&#xA;&gt; &#34;pseudo-soft-fork&#34;&#xA;&gt;&#xA;&gt; My reasoning being that after implementation, a chain with less total work&#xA;&gt; than&#xA;&gt; the main chain - but more total SHA256^2 work than the main chain - might&#xA;&gt; be&#xA;&gt; followed by non-supporting clients. It&#39;s got some properties of a&#xA;&gt; soft-fork,&#xA;&gt; but it&#39;s security model is definitely different.&#xA;&gt;&#xA;&gt; &gt; ### Aux POW intermediate block&#xA;&gt; &gt;&#xA;&gt; &gt; Auxiliary POW blocks are introduced between normal blocks - i.e. the&#xA;&gt; chain&#xA;&gt; &gt; alternates between the two POWs.&#xA;&gt; &gt; Each aux-POW block points to the previous normal block and contains&#xA;&gt; &gt; transactions just like a normal block.&#xA;&gt; &gt; Each normal block points to the previous aux-POW block and must contain&#xA;&gt; all&#xA;&gt; &gt; transactions from the aux-POW block.&#xA;&gt;&#xA;&gt; Note how you&#39;re basically proposing for the block interval to be decreased,&#xA;&gt; which has security implications due to increased orphan rates.&#xA;&gt;&#xA;&gt; &gt; ### Heaviest chain rule change&#xA;&gt; &gt;&#xA;&gt; &gt; This is a semi-hard change, because non-upgraded nodes can get on the&#xA;&gt; wrong&#xA;&gt; &gt; chain in case of attack.  However,&#xA;&gt;&#xA;&gt; Exactly! Not really a soft-fork.&#xA;&gt;&#xA;&gt; --&#xA;&gt; https://petertodd.org &#39;peter&#39;[:-1]@petertodd.org&#xA;&gt;&#xA;&gt; _______________________________________________&#xA;&gt; bitcoin-dev mailing list&#xA;&gt; bitcoin-dev at lists.linuxfoundation.org&#xA;&gt; https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev&#xA;&gt;&#xA;&gt;&#xA;-------------- next part --------------&#xA;An HTML attachment was scrubbed...&#xA;URL: &lt;http://lists.linuxfoundation.org/pipermail/bitcoin-dev/attachments/20171106/4c91278d/attachment.html&gt;</html></oembed>