Which Consensus Algorithm Does Ethereum Use?


Ethereum has its built-in consensus algorithm, called Ethash. Ethash is used to determine what information needs to go into the block that is being mined. Because Ethereum uses a combination of proof of work and proof of stake, it is easy for users who hold Ether to verify transactions without using too much energy.


What is Ethash?


Ethash uses a hashing function known as Keccak-256 or SHA3-256. This hashing function takes an input and generates a hexadecimal number (a string consisting of numbers and letters). Also, if you take the output from Ethash after mining, you will get data that cannot be compressed and is random.


The input that gets put into the hashing process with ethos is dependent on what needs to be stored in the block, and this can change depending on how many transactions need to be verified. While Ethash was developed to solve the scalability problems created by proof-of-work, it has developed since then, and Ethereum now uses it as its main consensus algorithm.


How Does Ethash Differ from Proof of Work?


While Ethash shares some similarities with proof of work, there are also key differences between the two algorithms - mainly because they solve different issues. Bitcoin uses proof of work to ensure that miners are doing their job properly while preventing them from cheating or having someone take over 51%of the network. 


Proof of work does this by having miners solve a cryptographic puzzle known as a hash found on each block of Bitcoin. We hope that this article has made you clear about the algorithm that is used by Ethereum.