Hashing is a process that can take any stream of data as an input and transform it into a dataset of fixed size (known as a hash) using a non-reversible mathematical formula. In other words, it is trivial to use this function to generate a uniform-sized hash for any piece of data, but it is not possible to determine the original string of data from the hash. Hashing is essential for the operation of bitcoin as it is used in digital signatures, proof-of-work, Merkle trees, transaction identifiers, bitcoin addresses, and various other applications. Hashing in essence allows identifying a piece
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