Quote from: kointrend on December 04, 2018, 07:41:04 PM

Hi,
Apart the Chainlocks implementation, could someone explain what this data about Dash mean? Is it really so cheap (6349$) attack the network during an hour? Is Dash well positioned respect others coins?
I'm just curious because it's a retweet of Szabo.

Thanks in advanced.

https://www.theblockcrypto.com/2018/12/03/long-tail-cryptocurrency-is-51-attacked-vertcoin-edition/

You can read up (or back) about it here : https://www.dash.org/forum/threads/51-attack-costs-on-cryptocurrencies-looking-for-feedback-on-article.38356/
I never did get a clear answer if Dash is really that cheap to attack..... i suspect it is not, specially now with the new ASIC miner out (the one with the very high price tag).
But on the other hand the price of Dash has dropped considerably.

Since the success of a 51% attack depends for a part on a weak hashrate, Dash seems less likely to get hit by 51% attacks thanks to Dash (still) relatively high hashrate and costly hardware.
And with regards to InstantSend possibly forming a protection against 51% attacks :

* TroyDash :

Quote

InstantSend does not prevent a 51% mining attack, and someone would not need to control 51% of masternodes in order to execute a 51% attack on transactions including InstantSend txs. What InstantSend does is it makes it just as safe to accept a
zero-confirmation transaction as it would be to accept a normal 6-confirmation or 20-confirmation transaction (but not infinite, because the locks do expire eventually at some point *after* the tx has been included in a block). With the understanding that 20-confirmation
transactions are still susceptible to a sustained 51% attack just like they would be in any other PoW chain. If a 51% mining attacker were to mine on a forked chain and get more proof of work and get something like 100 blocks ahead, then the original chain would still be
abandoned in favor of the new chain.

Dash current hashrate and overview of mining pools active on Dash network :

https://bitinfocharts.com/comparison/dash-hashrate.html
https://chainz.cryptoid.info/dash/#!extraction

Chainlocks obviously provides far better protection against these kind of malicious attacks, then just having high hashrate and high hardware costs.