01 What are Hashes?

Hash function – Wikipedia

A hash or scatter function calculates a check value/hash value or hash for a message. The check value has a defined length independent of the message.

Hashes are usually used to ensure the integrity of data.
Thus hash functions should have the following properties:

collision resistant: different messages generate different hashes
irreversible: the message can only be extracted from the hash value with great effort.

GC Wizard can calculate hashes according to the following methods:

  • Message Digest: MD2, MD4, MD5
  • Secure Hash Algorithm: SHA, SHA-1, SHA-2, SHA-3
  • Keccak
  • Tiger
  • Whirlpool
  • BLAKE2b