Image Encryption Using the Chaotic Josephus Matrix

Table 1

Adjacent pixel autocorrelation analysis.

Correlation coefficients (10^−3)		Horizontal	Vertical	Diagonal
Plaintext	Lena	939.9652	970.9000	970.9894
Ciphertext	CJPM	−2.2281	−0.3709	3.265
	[6]	2.0970	16.1870	17.805
	[8]	−2.5000	−1.0000	−9.3000
	[5]	5.7765	28.434	20.662
	[29]	−12.7212	−60.2579	62.4427
	[9]	−13.4000	1.2000	39.8000
	[30]	−15.8900	−65.3800	−32.3100
	[16]	81.5860	−40.0530	−4.7150
	[10]	125.7000	58.1000	50.4000