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

<table class="table-group" id="tab13"><tr><td><table class="table"><tr><td class="thead-hr" colspan="8"><hr/></td></tr><tr class="thead"><td class="align_left" rowspan="2">Image</td><td class="align_center" rowspan="2">Chi value</td><td class="align_center" colspan="3">Correlation</td><td class="align_center" colspan="2">Entropy</td><td class="align_center" rowspan="2">Contrast</td></tr><tr class="thead"><td class="align_center">Hor.</td><td class="align_center">Ver.</td><td class="align_center">Dia.</td><td class="align_center">Global</td><td class="align_center">Local</td></tr><tr><td class="thead-hr" colspan="8"><hr/></td></tr><tr><td class="align_left">Enc-white</td><td class="align_center">279.8320</td><td class="align_center">−0.0015</td><td class="align_center">0.0004</td><td class="align_center">0.0007</td><td class="align_center">7.99923</td><td class="align_center">7.9023</td><td class="align_center">10.50954</td></tr><tr><td class="align_left">Enc-black</td><td class="align_center">280.1445</td><td class="align_center">−0.0002</td><td class="align_center">0.0001</td><td class="align_center">0.0011</td><td class="align_center">7.99922</td><td class="align_center">7.9026</td><td class="align_center">10.46016</td></tr><tr class="table-tr"><td colspan="8"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Statistical examinations of the cipher full-white and full-black images.</div>

Security and Communication Networks

tab13

Table 13

Table 13: Securing Digital Images through Simple Permutation-Substitution Mechanism in Cloud-Based Smart City Environment 