Role of Hash Functions in Blockchain

Hash functions play an important role in ensuring the security and integrity of data in the blockchain. They transform any data into a fixed-length string called a hash, which is unique for each set of data. This allows checking whether the data has been altered, as even small changes in the original data will result in a completely different hash. Hash functions provide transparency since each block in the chain is linked to the previous one via a hash. This makes the blockchain system resistant to attacks, ensuring that the information cannot be changed without consequences.