Hash Toolkit

What is a Hash Function?

A cryptographic hash function is a mathematical algorithm that maps data of arbitrary size to a bit string of a fixed size (a hash). It is a one-way function, meaning it is computationally infeasible to invert (turn the hash back into the original input).

Key Properties

• Deterministic: The same input always results in the same hash.
• Quick: It is fast to compute the hash for any given data.
• Collision Resistant: It is extremely difficult to find two different inputs that produce the same hash.
• Avalanche Effect: A small change in input changes the hash so extensively that the new hash appears uncorrelated with the old one.

Algorithm Comparison

Common Use Cases

Hashes are used for verifying file integrity, secure password storage (with salting), and in digital signatures.