A Novel Chaotic Image Encryption Algorithm Based on Latin Square and Random Shift

Algorithm 2

Latin square substitution P_r = Replace (P, (i, j), L_r, L_table).

	Input: Plain image P, Lc, Lr, and Ltable.
	Output: Image Pr after pixel replacement.
	for i = 0 : 1: N−1 do
	for j = 0:1: N−1 do
	Pr (i, j) = Ltable ( (i, j), Lr (i, j))
	end
	end
	where bitget (P, i) (i = 1, 2, …, 8) represents obtaining the ith bit plane of the plain image P.