A joint image encryption and watermarking algorithm based on compressive sensing and chaotic map*
Xiao Di, Cai Hong-Kun, Zheng Hong-Ying†
       
Key sensitivity analyses on the proposed system: (a) the watermarked cipher image ‘Lena’, (b) the decrypted image by using the right keys, (c) the original watermark, (d) the decrypted ‘Lena’ by using the wrong k 1, (e) the decrypted ‘Lena’ by using the wrong k 2; (f) and (g) demonstrate the extracted watermarks by using the right k 2 and the wrong k 2.