3 ms·
To be pedantic, Keccak does have a 5 to 5 bit S-box. But like 3-Way, NOEKEON, Serpent, etc, it's disguised---bitsliced---as a short sequence of boolean operatio
by pbsd 9y ago
To be pedantic, Keccak does have a 5 to 5 bit S-box. But like 3-Way, NOEKEON, Serpent, etc, it's disguised---bitsliced---as a short sequence of boolean operations.
- cperciva 9y agoIf you want to be really pedantic, every boolean operation is just a 2->1 bit S-box...