<html dir="ltr"><head></head><body style="text-align:left; direction:ltr;"><div>There needs to be some form of reversal, typically designed at the beginning of the process. For example, it might include (in order of increasing severity):</div><div><br></div><div>* Data entry error: An update to the entry by the original creator or a third party designated by the creator. This should leave the original entry legible, but just annotate it, similar to PGP Revocation Certificates or a contra entry. (This should also notify the recipients of the original entry; so a publish/subscribe system might be a technological basis.)</div><div>* Fraudulent entry: A fix to the data should be possible by an overseeing body, again with full transparency.</div><div>* Illegal entry: Someone has submitted a trade secret, copyrighted material, or even child porn to the repository. It should be erasable, again with full transparency.</div><div><br></div><div>-Marcel</div><div><br></div><div>On Tue, 2018-10-02 at 12:45 -0400, John Levine wrote:</div><blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex"><pre>In article <<a href="mailto:0accf29eeb5c4b7e9012688532f9a7cdbabc778d.camel@isoc.ch">0accf29eeb5c4b7e9012688532f9a7cdbabc778d.camel@isoc.ch</a>> you write:</pre><pre>Aren't "responsible for blockchain governance" and "proof-of-work"</pre><pre>diametral opposites?</pre><pre>With PoW, the goal is that nobody can exert control on the contents of</pre><pre>the blockchain [1]. To me, this implies that there is no governing body</pre><pre>who can "fix things" if they are broken.</pre><pre><br></pre><pre>That's true as far as it goes, but a PoW system makes the often</pre><pre>unrealistic assumption that nobody can control 51% of the miners.</pre><pre>Given the size of some mining pools and the opacity of many mining</pre><pre>operations, that strikes me as a major leap of faith.</pre><pre><br></pre><pre>You always have to trust someone. The only question is who. You will</pre><pre>find that in the outside world, people want the ability to back out</pre><pre>bogus transactions, and the few systems that you can't reverse, like</pre><pre>international bank wires, have horrible fraud and security problems.</pre><pre><br></pre><pre>The application to food is fairly obvious: when (not if) someone puts</pre><pre>in bogus data, who recognizes it and what do you do about it?</pre><pre><br></pre><pre>R's,</pre><pre>John</pre><pre><br></pre><pre><br></pre><pre><br></pre></blockquote></body></html>