How lorenz chaotic map generate a key for confusion and diffusion?

How lorenz map generate a key by using lorenz map equation ˙ x = σ(y−x) ˙ y = ρx−y + xz ˙ z = −βz + xy, where σ,ρ,β are positive parameters by using this equation how it applied to the image encryption process. my project has 3 chaotic maps one is lorenz and chen and lu by using these three maps one is selected by the system parameter which is obtained from the key and it is applied to the digital color image encryption of image confusion and diffusion. the three maps having three equations.