Quote from: Anonymousg64 on March 29, 2014, 05:30:07 AM

Quote from: coolbeans94 on March 29, 2014, 05:23:17 AM

Quote from: Anonymousg64 on March 29, 2014, 05:20:36 AM

Quote from: coolbeans94 on March 29, 2014, 05:15:37 AM

Quote from: Anonymousg64 on March 29, 2014, 05:03:45 AM

Quote from: Anonymousg64 on March 29, 2014, 04:51:22 AM

i have discovered a flaw with current PoS implementation

you can easily do a 51% attack with PoS blocks without needing large holdings

since PoS blocks are generated on a coin age basis, you could create TXO's delayed by a time offset at the minimum TXO cost for a future attack period

so after creating 10000 TXO of 1 MINT separated by 0.5 seconds to make sure 60 consecutive blocks are generated at repeated interval by your wallet 20 days in the future, the attack would last 1 hour and 40 minutes

enough to put the security and function of a coin in question

couple that with the fact the difficulty calculation includes PoS blocks, that would mean difficulty would jump to stratospheric levels making it impossible to mine PoW blocks

are people really not concerned about this?

YOU CAN 51% ATTACK ANY POS COIN WITHOUT THE NEED FOR 51% OF SUPPLY OR ANY PoW HASHRATE AT ALL

Not concerned because it is not true. Go ahead and try it if you think it is so easy.

i am not interested in doing an attack, but you should be worried that it is doable.
go over the logic

THIS IS FIXABLE, BUT REQUIRES A HARD FORK

I don't think so, but for arguments sake, what's the fix?

reduce weight of PoS blocks in difficulty calculation
set valid PoS block condition to use coin-days and not coin age, difference being coin-days is ammount of coins * coin age

That is what it uses coin days. It is ammount of coins * coin age. And it doesn't start until after 20 days of waiting.