تعريف hash function في الإنجليزية الإنجليزية القاموس.
an algorithm that generates a numeric, or fixed-size character output from a variable-sized piece of text or other data; used in database table queries, cryptography and in error-checking
one-way function (not reversible) that changes input data in to a unique digital code (also used in information security as a "digital signature" that identifies the sender and verifies the contents of the message)