A Fair and Privacy-Preserving Image Trading System Based on Blockchain and Group Signature

<table class="table-group" id="tab2"><tr><td><table class="table"><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr class="thead"><td class="align_left"> </td><td class="align_center"><span style="width: 6.63704ptpx;"><svg height="9.39034pt" id="M458" style="vertical-align:-3.42943pt" version="1.1" viewbox="-0.0498162 -5.96091 6.63704 9.39034" width="6.63704pt" 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="M478 372C478 418 458 448 431 448C409 448 389 431 389 410C389 404 391 400 394 395C398 388 406 371 406 348C406 253 308 122 251 51H249C254 122 249 257 231 336C212 421 189 448 159 448C126 448 75 412 23 327L48 306C83 354 103 371 115 371C125 371 134 360 144 334C185 224 192 64 183 -19C146 -100 116 -202 110 -244L125 -261C154 -259 208 -234 222 -220C222 -194 225 -84 235 -23C247 -3 273 36 308 79C379 165 478 288 478 372Z"></path></g></svg></span></td><td class="align_center"><span style="width: 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-11 241 -11Z"></path></g><g transform="matrix(.013,0,0,-0.013,6.084,0)"><path d="M169 380V459C122 440 66 423 24 416V392C86 384 90 382 90 317V-135C90 -201 81 -207 17 -213V-240H253V-213C176 -207 169 -201 169 -125V6C182 -1 208 -11 238 -12C368 12 487 109 487 260C487 358 421 449 310 449C298 449 279 444 261 433L169 380ZM169 346C196 367 237 389 269 389C341 389 403 329 403 221C403 109 347 37 263 37C228 37 191 53 169 76V346Z"></path></g><g transform="matrix(.013,0,0,-0.013,12.805,0)"><path d="M513 0V26C475 28 448 43 413 81C379 116 277 234 258 264C301 314 319 334 344 359C383 396 404 407 473 418V443L269 434V408C317 403 320 395 299 364C280 337 250 298 228 276C213 260 195 247 165 241V712C126 699 69 682 21 677V653C82 648 87 642 87 576V104C87 40 81 32 14 26V0H237V26C173 32 165 38 165 104V215C171 217 176 218 181 218C189 218 198 212 212 196C267 129 330 49 376 -2L513 0Z"></path></g></svg></span></td><td class="align_center"><span style="width: 10.5657ptpx;"><svg height="12.8874pt" id="M460" 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261 161 329 221 355C248 350 281 347 314 347C330 347 370 388 370 406C370 418 366 422 352 422C321 422 280 413 255 407C218 413 192 448 192 493C192 544 229 588 266 610C309 610 354 615 376 623C397 631 425 651 425 682Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,5.499,3.132)"><path d="M389 0V32C297 38 291 46 291 118V635C234 613 175 595 109 583V556L161 554C203 552 207 547 207 497V118C207 46 201 38 110 32V0H389Z"></path></g></svg></span></td></tr><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td class="align_left">Average value</td><td class="align_center">27.878 <i>μ</i>s</td><td class="align_center">2.751 ms</td><td class="align_center">5.008 ms</td><td class="align_center">4.235 ms</td></tr><tr><td class="align_left" colspan="5"><hr/></td></tr><tr><td class="align_left"> </td><td class="align_center"><span style="width: 17.4153ptpx;"><svg height="12.7112pt" id="M462" style="vertical-align:-3.403299pt" version="1.1" viewbox="-0.0498162 -9.3079 17.4153 12.7112" 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102 374 102 310V104C102 38 97 33 29 26V0H246V26C187 32 181 36 181 104V339C211 365 250 390 290 390C357 390 381 345 381 276V109C381 40 374 32 315 26V0H524Z"></path></g></svg></span></td></tr><tr><td class="align_left" colspan="5"><hr/></td></tr><tr><td class="align_left">Average value</td><td class="align_center">29.442 <i>μ</i>s</td><td class="align_center">8.091 ms</td><td class="align_center">7.186 ms</td><td class="align_center">1.796 ms</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Security and Communication Networks

tab2

Table 2

Table 2: A Fair and Privacy-Preserving Image Trading System Based on Blockchain and Group Signature 