Keccak-256

Ethereum uses the Keccak-256 hashing algorithm to generate cryptographic hashes for various purposes, including creating new blocks, verifying transactions, and securing the blockchain.

The Keccak-256 algorithm was selected by the Ethereum developers in part because it is a well-regarded and widely-used cryptographic hashing algorithm that is known to be secure and resistant to attacks. In addition, the Keccak-256 algorithm is also faster and more efficient than other hashing algorithms that were considered, such as SHA-3 and SHA-256.

Another important factor in the selection of Keccak-256 was its compatibility with the other components of the Ethereum network, including the Ethereum Virtual Machine (EVM) and the various smart contract languages and tools that are used to develop and deploy decentralized applications on the platform.

Overall, the choice of Keccak-256 as the hashing algorithm for Ethereum was a deliberate and well-considered decision, designed to provide the highest level of security, efficiency, and compatibility for the Ethereum network and its users.