Questions related to hashes, hash values or hash codes that are returned by hash functions such as SHA-1.

A hash is any well-defined procedure or mathematical function that converts a large, possibly variable-sized amount of data into a small datum, usually a single integer representing the sum of the correct digits in a piece of stored or transmitted digital data, against which later comparisons can be made to detect errors in the data. The values returned by a hash function are called hash values, hash sums, checksums or simply hashes.

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