Table 1.

Security analysis presented in recent chaos-based image cryptosystems, where √ means “presented” and - means “not presented”.

Reference	[25]	[27]	[28]	[30]	[31]	[36]	[37]	[38]	[42]	[43]
Publication Year	2015	2016	2016	2017	2017	2018	2018	2018	2019	2019
Chaos
Chaos validation	√	-	√	√	√	-	√	√	√	√
Security
Key space	√	√	√	√	√	√	√	√	-	√
Key sensitivity	√	√	√	√	√	√	√	√	-	√
Plain text sensitivity	√	√	√	√	√	√	√	√	√	√
Graphic histogram	√	√	√	√	√	√	√	√	√	√
Histogram statistics	-	-	-	-	√	-	-	-	-	√
Histogram uniformity	-	-	-	-	-	-	-	-	-	-
Graphic correlation	√	√	√	√	√	√	-	√	√	-
Correlation coefficient	√	√	√	√	√	√	-	√	√	√
Graphic autocorrelation	-	-	-	-	-	-	-	-	-	-
Information entropy	√	√	√	√	√	√	√	√	√	√
Encryption quality	-	-	√	√	-	-	√	√	-	-
Decryption error	√	-	-	-	-	-	-	-	-	-
Floating frequency	-	-	-	-	-	-	-	-	-	-
Noise robustness	-	-	-	-	√	-	-	√	-	-
Occlusion robustness	-	-	√	√	-	-	-	√	-	-
Cost and performance
Memory requirements	-	-	-	-	√	-	-	-	-	-
Algorithm efficiency	-	√	-	-	-	-	√	-	-	-
Speed analysis	√	√	√	√	√	√	√	√	√	-
Algorithm and implementation
Flexibility	-	-	-	-	-	-	-	-	-	-
Simplicity	-	-	-	-	-	-	-	-	-	-