In Nxt this problem doesn't arise coz all participants (miners) r known.
I came to know about NXT and I found its entirely proof-of-stake design very attractive, so I'm reading documentation.
I would like to also spread the word about it, but I'm a bit concerned about linking a site which is supposed to have a technical explaination, when it's written with these cool-youngster abbreviations.
Could you please edit the post in proper English?
If you want, I can fix it myself and you just copy-paste it into your post (though it would be better if a native speaker did that).
Thanks for your consideration.