Modified Ciphertext-Policy Attribute-Based Encryption Scheme with Efficient Revocation for PHR System

<table class="table-group" id="tab3"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left">Type</td><td class="align_center">Description</td><td class="align_center">Time for 1000 operations</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left"><i>T</i>0</td><td class="align_center">Time for two-vector multiplication</td><td class="align_center">Depending on the vector length</td></tr><tr><td class="align_left"><i>T</i>1</td><td class="align_center">Time for one PBC pairing operation</td><td class="align_center">875443 (<i>us</i>)</td></tr><tr><td class="align_left"><i>T</i>2</td><td class="align_center">Time for one PBC exponent operation</td><td class="align_center">1419140 (<i>us</i>)</td></tr><tr><td class="align_left"><i>T</i>3</td><td class="align_center">Time for one PBC multiply operation</td><td class="align_center">13264 (<i>us</i>)</td></tr><tr><td class="align_left"><i>T</i>4</td><td class="align_center">Time for one PBC addition operation</td><td class="align_center">1196 (<i>us</i>)</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Time consumption of different types of operation.

Mathematical Problems in Engineering

tab3

Table 3

Table 3: Modified Ciphertext-Policy Attribute-Based Encryption Scheme with Efficient Revocation for PHR System 