Cryptanalysis and Improvement of an Efficient and Secure Medical Image Protection Scheme

Table 4

Differences between cipher images produced by slightly different keys.

Figures	Encryption keys				Differences between Figure 8(b)
	Figure 8(c)	41	8	0.3		3.999	99.60%
Figure 8(e)	40	9	0.3	3.999	99.63%
Figure 8(g)	40	8	0.3 + 10^−14	3.999	99.61%
Figure 8(i)	40	8	0.3	3.999 + 10^−14	99.59%