How do you determine who gets to participate in this separate blockchain?  Can anyone join?  Or are there barriers to entry?  Because if there are barriers to entry, then you&#x27;ve now created a single centralized authority that issues these keys, and you thus don&#x27;t really have a decentralized system at all.<p>If each participant individually judges the merits of other participants, then everything will quickly diverge as some blocks are accepted by some participants but not by others, and the whole network collapses into forks.