[Retracted] A Double-Layer Image Encryption Scheme Based on Chaotic Maps and DNA Strand Displacement

Table 5

NPCR and UACI.

Image	NPCR (%)	UACI (%)
Figures 8(a) and 8(b)	99.6475	31.2188
Ref. [15]	99.6017	28.1370
Ref. [25]	99.6100	38.0000