A Lightweight Identity-Based Cloud Storage Auditing Supporting Proxy Update and Workload-Based Payment

<table class="fixed-width table-group" id="tab4"><tr><td><table class="table"><colgroup><col style="width:3.77em"/><col style="width:8.83em"/><col style="width:17.63em"/><col style="width:18.72em"/></colgroup><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr class="thead"><td class="align_left">Entity </td><td class="align_center">Phase </td><td class="align_center">Communication overhead (Our scheme)</td><td class="align_center">Communication overhead (Wang et al. [<a href="/journals/scn/2019/8275074/#B5" target="_blank">5</a>])</td></tr><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr><td class="align_left">TPA</td><td class="align_center">Auditing challenge</td><td class="align_center"><span style="width: 64.6995ptpx;"><svg height="12.7178pt" id="M468" style="vertical-align:-3.42947pt" version="1.1" viewbox="-0.0498162 -9.28833 64.6995 12.7178" width="64.6995pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M383 397C383 424 344 448 299 448C244 448 172 409 132 375C66 319 23 227 23 146C23 42 74 -12 146 -12C208 -12 298 30 359 103L343 124C315 95 248 48 192 48C145 48 111 85 111 163C111 228 129 294 151 330C171 363 201 401 241 401C275 401 302 384 325 356C332 347 339 344 348 348C373 360 383 381 383 397Z"></path></g><g transform="matrix(.013,0,0,-0.013,8.188,0)"><path d="M170 255C170 288 146 313 114 313S58 288 58 255C58 221 82 198 114 198S170 221 170 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class="align_left">Cloud</td><td class="align_center"> Auditing proof</td><td class="align_center"> <svg height="12.7178pt" id="M470" style="vertical-align:-3.42947pt" version="1.1" viewbox="-0.0498162 -9.28833 41.4423 12.7178" width="41.4423pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M162 -163V703H101V-163H162Z"></path></g><g transform="matrix(.013,0,0,-0.013,3.419,0)"><path d="M570 304C570 398 525 448 414 448C385 448 343 445 312 434L329 511L321 518C297 504 262 482 244 460L233 411C195 397 159 381 128 358L135 332C160 347 189 360 224 373L111 -147C97 -210 84 -218 17 -231L13 -257L254 -247L259 -218L233 -216C183 -212 177 -202 189 -142L218 -1C238 -10 266 -12 283 -12C351 3 429 48 483 105C543 168 570 242 570 304ZM482 289C482 161 380 33 304 33C278 33 248 51 233 69L303 396C326 400 352 403 369 403C428 403 482 380 482 289Z"></path></g><g transform="matrix(.013,0,0,-0.013,11.129,0)"><path d="M162 -163V703H101V-163H162Z"></path></g><g transform="matrix(.013,0,0,-0.013,17.454,0)"><path d="M535 230V280H323V490H265V280H52V230H265V-3H323V230H535Z"></path></g><g transform="matrix(.013,0,0,-0.013,27.99,0)"><path d="M162 -163V703H101V-163H162Z"></path></g><g transform="matrix(.013,0,0,-0.013,31.409,0)"><path d="M474 429L457 433C435 440 389 448 367 448C348 448 323 446 309 443C266 434 195 406 148 366C78 307 23 210 23 101C23 35 55 -12 92 -12C118 -12 146 1 196 35C247 70 311 130 346 173H348L281 -148C268 -211 256 -221 208 -229L191 -232L187 -257L433 -245L437 -219L411 -216C357 -210 350 -205 362 -140L427 207C447 315 461 381 474 429ZM387 387C379 337 363 262 355 236C318 180 201 57 142 57C126 57 112 81 112 128C112 205 150 321 220 376C244 395 280 403 312 403C345 403 370 396 387 387Z"></path></g><g transform="matrix(.013,0,0,-0.013,37.792,0)"><path d="M162 -163V703H101V-163H162Z"></path></g></svg></td><td class="align_center"> <svg height="12.7178pt" id="M471" style="vertical-align:-3.42947pt" version="1.1" viewbox="-0.0498162 -9.28833 41.4423 12.7178" width="41.4423pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M162 -163V703H101V-163H162Z"></path></g><g transform="matrix(.013,0,0,-0.013,3.419,0)"><path d="M570 304C570 398 525 448 414 448C385 448 343 445 312 434L329 511L321 518C297 504 262 482 244 460L233 411C195 397 159 381 128 358L135 332C160 347 189 360 224 373L111 -147C97 -210 84 -218 17 -231L13 -257L254 -247L259 -218L233 -216C183 -212 177 -202 189 -142L218 -1C238 -10 266 -12 283 -12C351 3 429 48 483 105C543 168 570 242 570 304ZM482 289C482 161 380 33 304 33C278 33 248 51 233 69L303 396C326 400 352 403 369 403C428 403 482 380 482 289Z"></path></g><g transform="matrix(.013,0,0,-0.013,11.129,0)"><path d="M162 -163V703H101V-163H162Z"></path></g><g transform="matrix(.013,0,0,-0.013,17.454,0)"><path d="M535 230V280H323V490H265V280H52V230H265V-3H323V230H535Z"></path></g><g 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<div>The communication overhead of our scheme and Wang et al. scheme [<a href="/journals/scn/2019/8275074/#B5" target="_blank">5</a>].</div>

Security and Communication Networks

tab4

Table 4

Table 4: A Lightweight Identity-Based Cloud Storage Auditing Supporting Proxy Update and Workload-Based Payment 