What Is a 51% Attack, and How To Detect It?

Adekunle Joshua

The 51% Attack is also called the majority attack.

51% Attack occurs when miners or a mining pool control more than 50% of the network’s mining hash.

These attackers control the network to reverse transactions and create double-spending.

Routine checks and delayed proof-of-work help detect and prevent 51% Attack.

The Michigan Institute for Technology’s Digital Currency Initiative detected and observed over forty 51% Attacks.

The attacks were conducted in networks such as Bitcoin Gold, Litecoin, and other smaller cryptocurrencies.

51% Attack is prevalent and successful in a cryptocurrency or blockchain protocol with a low participation rate. The more the participation rate of a cryptocurrency, the more difficult and risky it is for the attackers.

The easiest way to detect a planned 51% attack is when a mining pool owns and controls more than 50% of a network’s mining hash rate.