A Robust and Fast Image Encryption Scheme Based on a Mixing Technique

Table 3

Correlation coefficient of images before and after encryption.

Plain image	Size	Cor. coef.	Original image		Ciphered image
			Proposed scheme		[38]	[44]
Cameraman	(256  256)	HC	0.9314	−0.009	−0.009	—
		VC	0.9400	0.014	0.010
		DC	0.8931	−0.006	−0.006
Lena	(512  512)	HC	0.9849	0.001	0.001	0.008
		VC	0.9928	−0.011	−0.014	0.001
		DC	0.9734	−0.006	−0.006	−0.004
Plane	(900  600)	HC	0.9956	0.002	—	0.013
		VC	0.9942	−0.012		0.012
		DC	0.9951	0.017		−0.003