Secure Hash Algorithm 3 (SHA-3)#
The Secure Hash Algorithm 3 (SHA-3) is a set of 6 cryptographic hash functions as a subset of the Keccak algorithm.
Used operations: And, Xor, Rot, Not.
| Variant | Block | State | Rounds | Output |
|---|---|---|---|---|
| SHA3-224 | 1152 b | 1600 b | 24 | 224 b |
| SHA3-256 | 1088 b | 1600 b | 24 | 256 b |
| SHA3-384 | 832 b | 1600 b | 24 | 384 b |
| SHA3-512 | 576 b | 1600 b | 24 | 512 b |
SHA3-256 (\" \") =
a7ffc6f8bf1ed76651c14756a061d662f580ff4de43b49fa82d80a4b80f8434a
Working Principle#
In contrast to SHA-2, SHA-3 is based on sponge construction in which data is "absorbed" into the sponge, then the result is "squeezed" out. In the absorbing phase, message blocks are XORed into a subset of the state, which is then transformed as a whole using a permutation function \(f\).