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IACR News item: 29 November 2024
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Unlike previous approaches, MAPCP is the first that simultaneously avoids using zk-SNARKs as the tool for zero-knowledge proofs and HTLC contracts to atomically exchange a secret for a payment. As a result, MAPCP sidesteps the common reference string (crs) creation problem and is compatible with virtually any cryptocurrency, even those with limited or no smart contract support. Moreover, MAPCP contributes to fungibility, as its payment transactions blend seamlessly with standard cryptocurrency payments. We analyze the security of MAPCP and demonstrate its atomicity, meaning that, (i) the buyer gets the digital product after the payment is published in the blockchain (buyer security); and (ii) the seller receives the payment if the buyer gets access to the digital product (seller security). Moreover, we present a construction of MAPCP in a use case where a customer pays a notary in exchange for a document signature. </div><span class="btn-link text-right expand-button body-expand">Expand</span> </div> </div> <div class="mt-4"> <p> Additional news items may be found on the <a href="/news/">IACR news page</a>. </p> </div> </main> <div id="pageFooter"> <footer class="container-fluid iacrMain-footer pt-4"> <div class="row px-4"> <div class="col-12 col-md-6 col-lg-3 mb-md-3"> <a href="/about/" class="h6 d-none d-md-block"> <strong>About</strong> </a> <p class="d-none d-md-block mt-2"> The <a href="/">International Association for Cryptologic Research (IACR)</a> is a non-profit scientific organization whose purpose is to further research in cryptology and related fields. <a href="/about/">Learn more...</a> </p> <div class="text-center"> <a href="//twitter.com/IACR_News" class="social" title="Twitter Feed"> <img src="/img/icons/twitter.svg" class="socialBtn" alt="Twitter logo"> </a> <a href="//youtube.com/TheIACR" class="social" title="YouTube Channel"> <img src="/img/icons/youtube.svg" class="socialBtn" alt="YouTube logo"> </a> <a href="//www.facebook.com/theiacr/" class="social" title="Facebook Page"> <img src="/img/icons/facebook.svg" class="socialBtn" alt="Facebook logo"> </a> <a href="https://weibo.com/iacr" class="social" title="Weibo"> <img src="/img/icons/weibo.svg" class="socialBtn" alt="Weibo logo"> </a> </div> </div> <div class="col-12 col-md-6 col-lg-3"> <a href="/meetings/" class="h6"> <strong>Events</strong> </a> <ul class="list-unstyled"> <li> <a href="/meetings/asiacrypt/">Asiacrypt</a> • <a href="/meetings/crypto/">Crypto</a> • <a href="/meetings/eurocrypt/">Eurocrypt</a> </li> <li> <a href="/meetings/ches/" title="Cryptographic Hardware and Embedded Systems">CHES</a> • <a href="/meetings/fse/" title="Fast Software Encryption">FSE</a> • <a href="/meetings/pkc/" title="Public Key Cryptography">PKC</a> • <a href="/meetings/tcc/" title="Theory of Cryptography Conference">TCC</a> </li> <li> <a href="//rwc.iacr.org/"> Real World Crypto </a> </li> <li> <a href="/schools/"> Schools </a> </li> <li> <a href="/events/"> Calendar of events </a> </li> </ul> </div> <div class="col-12 col-md-6 col-lg-3"> <a href="/publications/" class="h6"> <strong>Publications</strong> </a> <ul class="list-unstyled"> <li> <a href="/publications/access.php"> Access to Publications </a> </li> <li> <a href="/jofc/"> Journal of Cryptology </a> </li> <li> <a href="/transactions/tosc/"> Trans. on Symmetric Cryptology </a> </li> <li> <a href="https://tches.iacr.org/"> Trans. on CHES </a> </li> <li> <a href="https://cic.iacr.org/"> Communications in Cryptology </a> </li> <li> <a href="//eprint.iacr.org/"> Cryptology ePrint Archive </a> </li> <li> <a href="/cryptodb/"> Publication database </a> </li> </ul> </div> <div class="col-12 col-md-6 col-lg-3"> <a href="/services/" class="h6"> <strong>Services</strong> </a> <ul class="list-unstyled"> <li> <a href="/news"> News </a> </li> <li> <a href="/awards/"> Awards </a> </li> <li> <a href="/jobs/"> Jobs </a> </li> <li> <a href="https://register.iacr.org/membership/members/">Update your information</a> </li> <li> <a href="/membership.php">How to join</a> </li> <li class="d-block d-md-none"> <a href="/about/"> About the IACR </a> </li> </ul> </div> </div> <div class="row"> <div class="col-12 iacrMain-bottomOfFooter text-center py-2 mt-3"> <span class="align-middle"> <a href="/copyright.html">Copyright © <span id="thisYear"></span> <script>document.getElementById("thisYear").innerHTML = new Date().getFullYear();</script> <span class="d-none d-md-inline">by the </span><span class="d-md-none">IACR</span><span class="d-none d-md-inline">International Association for Cryptologic Research</span></a> <span class="d-none d-md-inline">• </span><br class="d-md-none"> <a href="/privacy.html">Privacy Policy</a> </span> </div> </div> </footer> <!-- populated by headerFooter.js --> </div> <script src="https://iacr.org/libs/js/jquery/3.3.1/jquery.min.js"></script> <script src="https://iacr.org/libs/css/bootstrap/dist/js/bootstrap.bundle.min.js"></script> <script src="https://iacr.org/libs/js/easy-autocomplete/jquery.easy-autocomplete.js"></script> <!-- Custom JS (load header & footer) --> <script src="/js/search.js"></script> </body> </html>