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

Table 1

Security contribution of the bit-level permutation in different rounds.

Rounds	Pixel correlation			MSE	Time (ms)
	Horizontal	Vertical	Diagonal
0 (plain image)				—	—
1				7190.2	22
2				7190.8	34
3				7191.7	44
5				7217.8	68