Image Encryption Algorithm Based on the H-Fractal and Dynamic Self-Invertible Matrix

Table 5

Analysis of cipher images with different sizes.

Cipher images	Correlation Coefficients			Entropies	NPCR (%)	UACI (%)
	Horizontal	Vertical	Diagonal
Lena 128 × 128	0.0002	−0.0008	−0.0028	7.9882	99.6094	33.1566
Lena 512 × 512	−0.0061	0.0014	−0.0012	7.9994	99.6147	33.4730
Cameraman 128 × 128	0.0028	0.0020	0.0011	7.9878	99.6399	33.3091
Cameraman 512 × 512	0.0012	−0.0052	−0.0028	7.9993	99.5831	33.4335
Peppers 128 × 128	0.0028	−0.0078	0.0098	7.9887	99.6216	33.3656
Peppers 512 × 512	−0.0005	0.0018	0.0063	7.9992	99.5899	33.4390
Baboon 128 × 128	−0.0062	0.0012	0.0062	7.9869	99.7253	33.6223
Baboon 512 × 512	−0.0071	−0.0053	−0.0067	7.9993	99.6162	33.5096