Security in the cryptocurrency world: what we should know

In the cryptocurrency world, there are several attacks cryptocurrency can suffer from. 51% of these threats are presented by monopoly problems and a double-spending attacks.
The most dangerous problem exists when one of the hosts possesses 51% or more computing power and gains a complete control over it. Such attacks usually occur in the POW-based cryptocurrencies only. When it happens, the swindler needs to buy some serious mining equipment which costs more than $15 billion. Though this sum may be considered very big, in fact it is doubled.
In ATB Coin network a 51% attack cannot happen. It is explained by the following reasons: As ATB Coin is a POS-based cryptocurrency, the hacker has to possess at least 51% of all network resources. He has to buy at least 25.5 million of ATB Coins. This quantity of ATB coins is 51% of the genesis block right after launch. Moreover, in case if such an attack occurs, the swindler wont get any benefits. It will negatively influence the market rate of the cryptocurrency. It means that the hacker himself will suffer from damages.
Speaking about double-spending ataccs, it should be noted that in ATB Coin they are prevented. It is necessary to confirm every transaction. In order to consider the blockchain valid, appropriate confirmations should be made. Therefore, it is obligatory to make not less than 6 confirmations in this process.