51% Attack on Other Cryptocurrencies Revisited: Is It Expensive? Not really
 
Husam Abboud, a researcher from a Brazilian university FECAP, has come up with an original method to calculate the price of a 51% attack — Rindex v2.0. Here're the results of his study:

• A successful attack on the Ethereum Classic blockchain would only cost $1.5 mln. To drive this cryptocurrency to complete bankruptcy, scammers would need to invest $55 mln in the attack, but it would allow them to earn $1 bln, thus making up for their investment by a large margin.
• A 51% attack on the Bitcoin Cash network would cost 250 BTC ($1,875,000) per day, on the Bitcoin Gold network — only 26 BTC ($200,000) which is almost ten times cheaper. Scammers can continue with the attack until developers release a fix or until the cryptocurrency price goes down to a level which is low enough to make the attack useless. In this case, cryptocurrency may sustain a lot of damage.

It's worth noting that Abboud's calculation never accounted for mining equipment and electricity costs since scammers don't have to pay for this — they can just rent computing power.
 
For instance, if miners who control as little as 2.5% of the Ethereum network hash rate simply switch over to the Ethereum Classic network, they will find themselves in control of 51% of the network's computing power. In this case, the daily price of an attack will be equivalent to the reward underreceived by the miners and amounting to about 525 ETH.
 
SPARTA is protected against 51% attacks by default
 
This publication is meant to once again highlight the idea that 51% attacks are quite real and can happen at any time, even due to a simple collusion by malicious network users. In this situation, bona fide users are in no way protected against the loss of all their funds which is a big disadvantage of cryptocurrencies using the Proof-of-Work (PoW) algorithm.
 
SPARTA, on the other hand, uses the Proof-of-Stake (PoS) algorithm which allows you to use a regular computer to support network operations — miners' computing power is not relevant. At the same time, all users who own at least 1,000,000 SPA have equal chances of creating a block. In other words, neither high powers, nor a high balance will allow anyone to carry out an attack of this type.
 
Join SPARTA right now and build a new, truly decentralized, secure financial system that would give its members truly equal rights!