A Lightweight Secure User Authentication and Key Agreement Protocol for Wireless Sensor Networks

<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">Notation</td><td class="align_center">Meaning</td><td class="align_center">Time</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left"><i>T</i><sub><i>m</i></sub></td><td class="align_center">Time of a point multiplication in <i>G</i></td><td class="align_center">7.3529</td></tr><tr><td class="align_left"><i>T</i><sub><i>R</i></sub></td><td class="align_center">Time of the Rep operation</td><td class="align_center">7.3529</td></tr><tr><td class="align_left"><i>T</i><sub><i>s</i></sub></td><td class="align_center">Time of a symmetric encryption/decryption</td><td class="align_center">0.1303</td></tr><tr><td class="align_left"><i>T</i><sub><i>h</i></sub></td><td class="align_center">Time of a hash operation</td><td class="align_center">0.0004</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Execution time of cryptographic calculations (ms) [<a href="/journals/scn/2019/2136506/#B41" target="_blank">41</a>].</div>

Security and Communication Networks

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Table 3

Table 3: A Lightweight Secure User Authentication and Key Agreement Protocol for Wireless Sensor Networks 