#### Answer Description

A hash value, hashed value or just a hash is the result of a one-way cryptographic function. Hashes are used to verify the integrity of data (e.g. a file download) as well as to store sensitive data such like passwords.

#### Wikipedia

A cryptographic hash function (CHF) is a hash function that is suitable for use in cryptography It is a mathematical algorithm that maps data of arbitrary size (often called the "message") to a bit string of a fixed size (the "hash value", "hash", or "message digest") and is a one-way function, that is, a function which is practically infeasible to invert Ideally, the only way to find a message that produces a given hash is to attempt a brute-force search of possible inputs to see if they produce a match, or use a rainbow table of matched hashes Cryptographic hash functions are a basic tool of modern cryptography

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