Quote from: boxalex on May 29, 2018, 11:00:03 PM

Quote from: StefanRvO on May 29, 2018, 09:31:31 PM

Quote from: Dogedarkdev on May 29, 2018, 08:59:17 PM

Quote from: StefanRvO on May 29, 2018, 08:26:53 PM

Since the chain trust is only based on the length of the chain and not cumulated work, wouldn't it be quite easy to perform a double spend with much less than 51% hashrate?

On the original chain, send e.g. 10M XVG to an exchange.

While you wait for confirmations, start mining an alternative chain where you step down the difficulty by fakeing the timestamps. This should still be possible even though the maximum drift is changed to 10 minutes, it will just be somewhat slower. In this chain you include a transaction which invalidates your original transaction. Even if you only have e.g. 5% hashpower, your chain should eventually get longer than the original chain as it has much lower difficulty.

After you have converted the XVG to BTC on the exchange, you submit your privately mined chain to the network, and as it is longer than the original chain, it will cause the nodes to reorganize to your chain. Am I missing anything or would this be completly possible?
This would also make it possible to perform the attack with extremly limited ressources as you don't really have to compete with the honest miners.

that wouldn't work because the invalidation would also be accepted.

Could you expand on what you mean by the invalidation would also be accepted?

If you on your private chain sends the coins to yourself instead of the exchange, you will still own the coins when the network reorgs to your chain after you brodcasts your blocks.

pumping up an important post that wasn't answered or discussed yet and in my opinion deserves some attention!! (quoted posts!)

Additionally, at about 22.24 (Verge explorer time) the difficulty again went to down to 400 on the lyra algo.
And recoved exactly 15 minutes later.
Not sure if right now the difficutly is again falling as i can't see yet how long this difficulty downtrend will last.
Just in case someone wants to investigate it further.

bringing these posts to a new page so the thread doesn't get to much watered by useless offtopic XVG fanboy talk