A Blockchain-Integrated Divided-Block Sparse Matrix Transformation Differential Privacy Data Publishing Model

<table class="table-group" id="tab7"><tr><td><table class="table"><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr class="thead"><td class="align_left">Dimensionality reduction program</td><td class="align_center">Operation time consumption (seconds)</td></tr><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr><td class="align_left">Householder</td><td class="align_center">2.08 × 10<sup>−1</sup>s</td></tr><tr><td class="align_left">Divided-block sparse matrix transformation</td><td class="align_center">4.06 × 10<sup>−2</sup>s</td></tr><tr class="table-tr"><td colspan="2"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Comparison of operation time consumption using Householder transform and sparse matrix transform on the Predict keywords activities in online social media dataset.</div>

Security and Communication Networks

tab7

Table 7

Table 7: A Blockchain-Integrated Divided-Block Sparse Matrix Transformation Differential Privacy Data Publishing Model 