IDA: Exercise

Exercise

Consider the shift register with

R = Z/2Z and s = 1 + X + X³.

For which initial values of the registers is the output stream constant?

None

g₀ = g₁ = g₂ = g₃ = 0

Both g₀ = g₁ = g₂ = g₃ = 0 and g₀ = g₁ = g₂ = g₃ = 1

No: think of all register begin put to zero.

No, this initial state leads to a constant output, but so does another...

Correct.