A Novel Image Encryption Algorithm Based on the Delayed Maps and Permutation-Confusion-Diffusion Architecture

Table 6

Values of NPCR and UACI.

Image name	Index	1 round			2 rounds
		Minimum	Maximum	Mean	Minimum	Maximum	Mean
Lena	NPCR	0.9921	0.9983	0.9952	0.9955	0.9968	0.9961
	UACI	0.3316	0.3362	0.3342	0.3322	0.3364	0.3346
Peppers	NPCR	0.9923	0.9981	0.9951	0.9957	0.9964	0.9961
	UACI	0.3334	0.3358	0.3346	0.3334	0.3358	0.3346
Boats	NPCR	0.9920	0.9979	0.9950	0.9959	0.9963	0.9961
	UACI	0.3339	0.3354	0.3347	0.3340	0.3358	0.3346
Man	NPCR	0.9923	0.9980	0.9952	0.9960	0.9962	0.9961
	UACI	0.3336	0.3350	0.3345	0.3342	0.3349	0.3346