Hacking

In a computer system, hacking generally refers to any unauthorized intrusion into a computer or network. The person engaged in hacking activities is known as a hacker. A hacker may alter system or security features to accomplish a goal that differs from the original purpose of the system.

Hash

A Hash or hash function is a function that can be used to transform digital data of an arbitrary size to digital data of a fixed size. The values returned by a hash function are called hash values, hash codes, hash sums, or most commonly, hashes. A cryptographic hash function takes input data, like an address or a credit card number, and transforms it into a compact string of seemingly random characters that generally renders the data useless in the event of a breach.