Securing Digital Images through Simple Permutation-Substitution Mechanism in Cloud-Based Smart City Environment

Table 12

NPCR and UACI of decrypted Sailboat image with the correct key and other decrypted Sailboat images with tiny modifications in the initial keys, as stated in Figure 10.

Image	NPCR (%)	UACI (%)
Figures 10(a) and 10(b)	99.604415	32.209367
Figures 10(a) and 10(c)	99.618912	32.198207
Figures 10(a) and 10(d)	99.613063	32.211601
Figures 10(a) and 10(e)	99.605052	32.217681
Figures 10(a) and 10(f)	99.600856	32.191464