The study shows that Bitcoin and Ethereum is very centralized.

The two-year study describes some of the shortcomings of the block chain of Bitcoin and Ethereum, in particular, showing that both networks are far from decentralisatie.

Peer-reviewed study entitled "decentralization in Bitcoin and Ethereum," written in accordance with the information collected in the period 2015-2017, and will be presented at the conference on financial cryptography and data security in Curacao in February.

The study says that four of the miner giant in Bitcoin and Ethereum three control more than 50% of the global hash power, and the entire blockchain of both systems “is defined less than 20 mining objects”.

The Ethereum is more decentralized than Bitcoin: the study showed that 28% of Ethereum nodes can be identified as data centers, compared to 56% in Bitcoin.

With regard to the size of a block of Bitcoins, the hot topics are actively discussed in the community, which led to the emergence of spin-off currency Bitcoin Cash, the researchers say: "The nodes in the network increased by an average of 1.7 times, which means that the block size can be increased without influence on the rates and without a significant increase in the cost of equipment."