7. "(Toy WG-5 cipher WG(5, 2)) Let finite field GF(2) be defined by a primitive poly- nomial g(z) 2+2+2+2+ 1 with root , the characteristic polynomial of 2-stage LFSR over GF(25) be given by p(r) 22+23.r+, and the wG5 permutation, given at slide 80 in Topic 3. The initialization phase of this toy WG cipher is an NLFSR, as shown in Figure 2 where WGP-5 is the WG5 permutation. C1 80 WGP-5 Figure 2: The initialization phase of WG(2, 5) stream cipher 7. "(Toy WG-5 cipher WG(5, 2)) Let finite field GF(2) be defined by a primitive poly- nomial g(z) 2+2+2+2+ 1 with root , the characteristic polynomial of 2-stage LFSR over GF(25) be given by p(r) 22+23.r+, and the wG5 permutation, given at slide 80 in Topic 3. The initialization phase of this toy WG cipher is an NLFSR, as shown in Figure 2 where WGP-5 is the WG5 permutation. C1 80 WGP-5 Figure 2: The initialization phase of WG(2, 5) stream cipher