The G Function

• S-boxes

  • Four key-dependent ones
  • Takes 8 bit input and produce 8 bit output

• MDS Matrices

  • Based on Maximum Distance Separable code
  • Single 4-by-4 MDS matrix over GF (28)
  • Output generated by a matrix multiplication over GF (28)

Previous slide

Next slide

Back to first slide

View graphic version