A New Hybrid Chaotic Map and Its Application on Image Encryption and Hiding

Algorithm 3

for i = 1 : 16

      dim1 = mod(𝑚_MD5 + 𝑛_MD5 + i, 3); dim2 = mod(𝑚_MD5 + 𝑛_MD5 + i  +  16, 3);

     Ca1(𝑚_MD5  +  i, N  −  𝑛_MD5  −  i, dim1) = Ca1(𝑚_MD5  +  i,  N  −  𝑛_MD5  − i, dim1) ∧ 15;

     Ca1(𝑚_MD5  +  i, N  −  𝑛_MD5  −  i, dim1) = Ca1(𝑚_MD5  +  i,  N  −  𝑛_MD5  − i, dim1) ∨  [MD5(i) · 16];

     Ca2(M  −  𝑚_MD5  −  i, 𝑛_MD5 +  i, dim2) = Ca1(M  −  𝑚_MD5  −  i,  𝑛_MD5 +  i, dim2) ∧ 15;

     Ca2(M  –  𝑚_MD5  −  i, 𝑛_MD5 +  i, dim2) = Ca2(M  −  𝑚_MD5  −  i,  𝑛_MD5 +  i, dim2) ∨  [MD5(i  + 16) · 16];

end