An Efficient Diffusion Scheme for Chaos-Based Digital Image Encryption

Table 2

Testing results when using baker map.

Test	1 round		2 rounds		3 rounds		4 rounds
Items	Proposed	Wang’s	Proposed	Wang’s	Proposed	Wang’s	Proposed	Wang’s
NPCR	99.60%	51.02%	99.61%	99.61%	99.62%	99.60%	99.61%	99.62%
UACI	33.44%	16.91%	33.47%	33.49%	33.51%	33.46%	33.48%	33.49%
Times (ms)	68.8	67.2	137.6	134.4	206.4	201.6	275.2	268.8