Image Encryption with Fusion of Two Maps

Table 5

Comparison of some ciphers using Lena as test image: TR: time required; RND: round numbers of diffusion; AC: average correlation; KS: key space; H: entropy; VH: variance of histograms.

Algorithm	TR (s)	RND	AC	KS	H	VH	UACI (%)	NPCR (%)
Proposed scheme	1.2	1	0.0024	7.2 × 10^134	7.9993	1091.1	33.41	99.6
[28]	1.69		0.017		7.9984		31.71	99.42
[30]	5.5		0.032	7.86 × 10^366	7.9993	819.48	33.47	99.64
[31]			0.0005		7.9998		33.47	99.64
[32]		1	0.0112	10^79	7.997		33.45	99.6
[27]	0.006	5	0.059	7.2 × 10^134	7.819		31.15	99.63