A Cloud-User Protocol Based on Ciphertext Watermarking Technology

<table class="table-group" id="tab3"><tr><td><table class="table"><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr><td class="align_left">JPEG compression</td><td class="align_center">QF = 25</td><td class="align_center">QF = 8</td><td class="align_center">QF = 5</td></tr><tr><td class="align_left">GF</td><td class="align_center">sigma = 0.3</td><td class="align_center">sigma = 1</td><td class="align_center">sigma = 4</td></tr><tr><td class="align_left">WGN</td><td class="align_center">PSNR = 18</td><td class="align_center">PSNR = 16.75</td><td class="align_center">PSNR = 16.41</td></tr><tr class="table-tr"><td colspan="4"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Security and Communication Networks

tab3

Table 3

Table 3: A Cloud-User Protocol Based on Ciphertext Watermarking Technology 