http://disqus.com/by/tailcast/enWed, 09 Dec 2020 03:46:59 -0000http://grisha.org/blog/2018/01/23/explaining-proof-of-work/#comment-5182302728<p>Re inter-galactic or universal clock - I do not understand what you mean given either the communication lag issues (practical breakdown) or the relativistic effects (relative difference in time required to solve the hash problems).... If we imagine the Twin 'paradox' experiment whereby at first the twins are communicating with each other and both are solving the arbitrary proof of work problems and will do so using exactly the same computers for the next '10 years'. One twin (b) then takes a rocket at 0.6c to a planet 3 light years away and then returns at the same speed (and assume there is no time spent on the turnaround.) On Earth twin A will have aged 10 years and Twin B will have aged 8 years when A &amp; B re-synchronise their relative spacetimes. For most of the intervening time they would not have been able to communicate a solution to the hash problem within the time required so in effect Twin A and Twin B have created two different bitcoin ledgers. If they compared each other's blockchains when Twin B returns Twin A would notice that B's clock (the amount of time taken for B'c computer to solve the arbitrary hash problems) has been running slower - that is B's blockchain would have less blocks because from the perspective of A everything related to B (including his atoms, any watch or clock and computers) ran slower in the intervening period. Likewise B would consider that A's computers were somehow better and quicker (they did more work) than his when he was travelling. So in practice there is no such thing as a definable fixed amount of work within an absolute 10 minute period. Did I misunderstand you on this point? Best Peter</p>Blockchain BiodiversityWed, 09 Dec 2020 03:46:59 -0000http://mobverge.blogspot.com/2008/04/madrid-based-tuenti-is-making-waves-in.html#comment-791328<p>looks interesting.would love to check it out but can see they have gone with a private invite only approach. we were thinking of doing that with our new social network but unless it is done for privacy or tech reasons reckon it looks like an unncessary marketing ploy. any one who is a member willing to invite me? best wishes Pete</p>Blockchain BiodiversityTue, 01 Jul 2008 13:54:37 -0000