[Cryptography] Bitcoin, litecoin, vertcoin, and derivatives

[Jae Kwon]

>
> NXT and some others are written from scratch rather than copy-pasting. NXT
> is using proof-of-stake, which has several problems (such as resusage of
> stake in a reversal of the chain (history attack), selling and buying coins
> and then selectively reversing transactions to amplify stake, the fact that
> there's no incentive to only use it stake to vouch for a single chain (no
> guarantee of concensus), etc). Most proof-of-stake coins that aren't dead
> already have checkpoints in the blockchain managed by the developer (making
> it centralized).
>
As the author, I claim that Tendermint solves the proof-of-stake problem.
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