FPGA Implementation of Improved Security Approach for Medical Image Encryption and Decryption

Table 9

Comparative study of NPCR and UACI tests for Lena image.

Image	NPCR (%)	UACI (%)
Proposed algorithm	99.69561	33.81015
Existing AES	0.0779	0.0097
Ref. [3]	99.62	33.41
Ref. [38]	99.6040	33.4614
Ref. [34]	99.6140	33.4805
Ref. [35]	99.6162	33.3979
Ref. [36]	99.61	33.48
Ref. [9]	99.62	33.56
Ref. [6]	99.60	33.48
Ref. [8]	99.50	33.30
Ref. [39]	99.6100	33.5000
Ref. [12]	Proposed 1 : 99.6253	Proposed 1 : 33.4565
	Proposed 2 : 99.6271	Proposed 2 : 33.5589
	Proposed 3 : 99.6188	Proposed 3 : 33.4468
	Proposed 4 : 99.6253	Proposed 4 : 33.4565
Ref. [13]	99.6258	33.4586
Ref. [14]	99.6125	33.4164
Ref. [15]	Proposed 1 : 99.6208	Proposed 1 : 33.4494
	Proposed 2 : 99.61	Proposed 2 : 33.4329
Ref. [41]	99.65950	33.83002
Ref. [42]	99.6315	33.8300