Securing Digital Images through Simple Permutation-Substitution Mechanism in Cloud-Based Smart City Environment

<table class="table-group" id="tab9"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left">Image</td><td class="align_center">Original</td><td class="align_center">Encrypted</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left">Boats</td><td class="align_center">0.37994</td><td class="align_center">10.51092</td></tr><tr><td class="align_left">Bridge</td><td class="align_center">0.47895</td><td class="align_center">10.49715</td></tr><tr><td class="align_left">Baboon</td><td class="align_center">0.61842</td><td class="align_center">10.51323</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Contrast values of the experimented greyscale images.</div>

Security and Communication Networks

tab9

Table 9

Table 9: Securing Digital Images through Simple Permutation-Substitution Mechanism in Cloud-Based Smart City Environment 