# Tag Info

Accepted

### Carry-less multiplication vs. multiplication in $GF(2^k)$

Firstly, your code is almost correct for multiplication in $GF(2^{32})$ provided that $p$ represents the bit coefficients for the monomials $x^{31},x^{30},\ldots,x^2,x,1$ in a degree 32 irreducible ...
• 9,596
Accepted

### On what Galois field AES really works?

No, in AES the $a_i$ are not bytes. They are bits. The 8 bits $a_i$ together form a byte, and are considered a single element of the Galois Field ${\operatorname{GF}\left(2^8\right)}$, also noted \$\...
• 122k