Secure Smart Healthcare Monitoring in Industrial Internet of Things (IIoT) Ecosystem with Cosine Function Hybrid Chaotic Map Encryption

Table 3

Algorithm 2, highly efficient scrambling.

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Input: keyframe (IR, IG, IB) channels size M × N, STC sequences, state
Output: cipher scrambled keyframe channels

(1) Obtain block size H = min {[M1/2], [N1/2]} of color channels separately (operated keyframe of bitwise XOR)

(2) Producing four STC sequences such as O, P, Q, and R

(3) Sorting each four STC sequences such as sort (O), sort (P), sort (Q), and sort (R) and obtaining their corresponding indexes

(4) Two matrixes S and T are initialized with the square of block size H² × H²

(5) Starting loop, for j = 1: H² (H² square of the block size within M × N)

(6) Starting loop, for i = 1: H²

(7)

(8) , Si, j = IOa, ti, j = IQb

(9) end of the for loop

(10) end of the for loop

(11) If en = = state

(12) Starting loop, for i = 1: H²

(13) Starting loop, for j = 1: H²

(14) m = Si, j; n = Tm, j;

(15) ; ;

(16) ; ;

(17) x = c1×H + c2 y = b1×H + b2

(18) Scramble channel (x, y) = operated keyframe of bitwise XOR channel (i, j)

(19) end of the for loop

(20) end of the for loop

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