Hash Function

tags :

Math functions that generate the Ciphertext Hash is one way or uni-directional and Cryptography is bidirectional, encrypted text will be decrypted.

Desirable properties: #

1. Entanglement every bit of the hash value depends on every bit of the input data. On average, changing on bit of input should cause 50% of the has bits to change.

2. Pseduo-randomness hash should be indistinguishable from the random data.

3. Nonreversibilty should be computationally infeasible to discover another input that generates the same value of hash.

cryptographic Hash Algorithms #

SHA-2(SHA-256) and SHA-3 are recommended and secure. SHA-1 has been comprosmised. MD5 is not as secure.