m(x) = 0x11b = 100011011 = x^8 + x^4 + x^3 + x + 1m(x) = (x^2 + 1) * a(x) + (x^5 + x^3 + x^2)
a(x) = 0x5b = 01011011 = x^6 + x^4 + x^3 + x + 1
1 0 0 0 1 1 1 1 0 1 1
1 1 0 0 0 1 1 1 0 1 0
1 1 1 0 0 0 1 1 0 0 0
1 1 1 1 0 0 0 1 0 0 1
SBOX(5b) = 1 1 1 1 1 0 0 0 * 1 + 0 = 1
0 1 1 1 1 1 0 0 1 1 1
0 0 1 1 1 1 1 0 1 1 0
0 0 0 1 1 1 1 1 1 0 0