A Secure and Efficient Image Transmission Scheme Based on Two Chaotic Maps

Table 4

UPCR and UACI values between cipher images when secret key changes.

Change	NPCR (%)	UACI (%)
Lowest bit of is inverted	99.6121	33.4601
Lowest bit of is inverted	99.6028	33.4625
Lowest bit of is inverted	99.6097	33.4837
Lowest bit of is inverted	99.6013	33.4633
Lowest bit of is inverted	99.6009	33.4764
Lowest bit of is inverted	99.6174	33.4512
Lowest bit of is inverted	99.6075	33.4810
Lowest bit of is inverted	99.6122	33.4706
Lowest bit of is inverted	99.6130	33.4562
Random image	99.6094	33.4635

The bold values are the ideal values.