Please help he to write Matlab code for this problem.Anu hint is also okay for me.

Encryption process: Step 1. Perform n level (KL1 , KL2 ) order Discrete wavelet transform on F, which is denoted by f(n,θ), where θ ∈ {A, H, V, D} and n denotes the level. Step 3. Again based on the logistic map and adopting keys Sj : j = 1, 2, 3, 4 as the initial values to generate four chaotic se- quences Sj = {0 < s(h) < M/n|1 ≤ h ≤ Lej }. The fi- nal values of Sj are used as the number of iterations for the cat map for each orientation. Step 4. Shuffle coefficients of every subband using Arnold cat map.Subbands belongs to orientation A is shuffle SLe1 times,H is shuffle SLe2 times, V is shuffle SLe3 times, and D is shuffle SLe4 times. Step 5. Perform inverse n level (KL1 , KL2 ) order DWT to get the encrypted image.