An Effective Color Image Encryption Based on Henon Map, Tent Chaotic Map, and Orthogonal Matrices

. 2022 Jun 8;22(12):4359. doi: 10.3390/s22124359

Algorithm 4. Pixel Diffusion

Input:

The Array E

, \sec ret key K_{3} = (ϕ (0), β)

, CTM (3)
Output:

Encrypted image C^{'}

1.
$Generate a sequence W = {W_{1}, W_{2}, …, W_{M}}$ $with key K_{3}$ and CTM (3).
2.
A sequence $W$ is transformed into an integer sequence by the given Equation (4)
$P_{K} = f l o o r (m o d (W_{K} \times 10^{14}, 256))$ (4)
3.
$Mix each element of E$ $with the parallel element of P_{K}$ and a bitwise XORing is performed to make an array
$C_{j} = P_{j} \oplus E_{j} \oplus C_{j - 1}, j = 1, 2, …, M .$
4.
$Change the array C_{j}$ $in the matrix form named as C^{'}$ of the size of
$M = P \times Q \times 3 .$