Chaotic Lightweight Cryptosystem for Image Encryption

Table 3

Analysis of obtained computational complexity in terms of time for different images.

Image type	Image name	Size	Encryption time (s)	Decryption time (s)	Total time (s)
Miscellaneous	Lena	128 × 128	0.6296	0.445	1.0747
		256 × 256	2.227	1.7223	3.9492
		512 × 512	9.5097	7.4552	16.9648
	Baboon	128 × 128	0.626	0.4399	1.0659
		256 × 256	2.2441	1.7865	4.0306
		512 × 512	8.8939	7.0877	15.9817
Medical image	Chest X-ray	128 × 128	0.6316	0.4436	1.0753
		256 × 256	2.2314	1.8311	4.0625
		512 × 512	8.9985	7.1753	16.1737
	ECG signal	128 × 128	0.6422	0.469	1.1112
		256 × 256	2.2348	1.7248	3.9597
		512 × 512	9.031	7.2521	16.2831
Underwater image	Fish species	128 × 128	0.6263	0.4486	1.0749
		256 × 256	2.2499	1.745	3.995
		512 × 512	8.9202	7.1831	16.1033
	Marine animal	128 × 128	0.8724	0.5213	1.3938
		256 × 256	2.2589	1.7382	3.9971
		512 × 512	9.0816	7.1498	16.2314
Texture	Straw	128 × 128	0.6327	0.4605	1.0931
		256 × 256	2.2493	1.7534	4.0026
		512 × 512	8.910	7.2109	16.1208
	Grass	128 × 128	0.6540	0.4690	1.123
		256 × 256	2.2462	1.7445	3.9907
		512 × 512	8.8482	7.2158	16.064