Image Encryption Technology Based on Fractional Two-Dimensional Triangle Function Combination Discrete Chaotic Map Coupled with Menezes-Vanstone Elliptic Curve Cryptosystem

Table 12

NPCR and UACI between cipher-images with slightly different plain-images.

Image	NPCR and UACI of Columbia
	NPCR (1-round %)	UACI (1-round %)	NPCR (2-round %)	UACI (2-round %)
Figure 15(a)(30, 30)	94.83	31.96	99.61	33.47
Figure 15(a)(50, 50)	93.48	31.40	99.48	33.36
Figure 15(a)(80, 80)	0.96	0.32	99.60	33.45
Figure 15(a)(100, 100)	1.11	0.38	99.61	33.51