Re: Cleanup: I'll attack some coins - I owned APEXcoin for 90 blocks

So, found any holes the Nxt devs missed in their implementation?

I think so... but as I said, I need some time to implement the attack and completely understand the implications... attacking still requires a lot of stake, looking how to improve that...

Which is why borrowing state becomes an option for someone wishing to attack a POS coin. That is the essence of the "Second Pirate Savings and Trust" attack.

I think borrowing coins/leased forging and such is the only major danger that I've seen thus far to a solid PoS set up like NXT. In general I think PoS communities need to be vigilant about discouraging mass lending as it seems to be the only plausible way that an attacker could gain a sufficient amount of stake.