Hash Functions

A cryptographic hash function is a kind of hash function where it is practically impossible to recreate the input data from its hash value alone. The input data is referred to as the ‘message’, and the hash value is called the ‘message digest’ or the ‘digest’. The result of this hash function can be used to validate if a larger file has been changed, without comparing the larger files. Examples of frequently used hash functions are MD5 and SHA1.