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Insecurity of One Decentralized Attribute-based Signature Scheme for Social Co-governance
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The four components of signature $\{\delta_1, \delta_2, \delta_3, \delta_4\}$ are not tightly bound to the target message $M$ and the signer's public key. The dependency between the signer's public key and secret key is not properly used to construct any intractable problem. The inherent flaw results in that the adversary can find an efficient signing algorithm functionally equivalent to the valid signing algorithm." /> <meta property="article:section" content="ATTACKS" /> <meta property="article:modified_time" content="2025-04-02T14:01:18+00:00" /> <meta property="article:published_time" content="2025-04-02T14:01:18+00:00" /> <meta property="article:tag" content="Attribute-based signature" /> <meta property="article:tag" content="forgery attack" /> <meta property="article:tag" content="signing algorithm" /> <meta property="article:tag" content="verification algorithm" /> <meta property="article:tag" content="anonymity" /> </head> <body> <noscript> <h1 class="text-center">What a lovely hat</h1> <h4 class="text-center">Is it made out of <a href="https://iacr.org/tinfoil.html">tin foil</a>?</h4> </noscript> <div class="fixed-top" id="topNavbar"> <nav class="navbar navbar-custom navbar-expand-lg"> <div class="container px-0 justify-content-between 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Signature Scheme for Social Co-governance</h3> <div class="author"><span class="authorName">Zhengjun Cao</span></div> <div class="author"><span class="authorName">Lihua Liu</span></div> <h5 class="mt-3">Abstract</h5> <p style="white-space: pre-wrap;">We show that the attribute-based signature scheme [Information Sciences, 654(2024), 119839] is insecure, because an adversary can generate valid signatures for any message even though he cannot access the signer's secret key. The four components of signature $\{\delta_1, \delta_2, \delta_3, \delta_4\}$ are not tightly bound to the target message $M$ and the signer's public key. The dependency between the signer's public key and secret key is not properly used to construct any intractable problem. The inherent flaw results in that the adversary can find an efficient signing algorithm functionally equivalent to the valid signing algorithm.</p> </div> <div id="metadata" class="col-md-5 col-lg-4 ps-md-5 mt-4 mt-md-0"> <h5>Metadata</h5> <dl> <dt> Available format(s) </dt> <dd> <a class="btn btn-sm btn-outline-dark" href="/2025/599.pdf"> <img class="icon" src="/img/file-pdf.svg">PDF</a> </dd> <dt>Category</dt> <dd><a href="/search?category=ATTACKS"><small class="badge category category-ATTACKS">Attacks and cryptanalysis</small></a></dd> <dt>Publication info</dt> <dd>Preprint. </dd> <dt>Keywords</dt> <dd class="keywords"><a href="/search?q=Attribute-based%20signature" class="me-2 badge bg-secondary keyword">Attribute-based signature</a><a href="/search?q=forgery%20attack" class="me-2 badge bg-secondary keyword">forgery attack</a><a href="/search?q=signing%20algorithm" class="me-2 badge bg-secondary keyword">signing algorithm</a><a href="/search?q=verification%20algorithm" class="me-2 badge bg-secondary keyword">verification algorithm</a><a href="/search?q=anonymity" class="me-2 badge bg-secondary keyword">anonymity</a></dd> <dt>Contact author(s)</dt> <dd><span class="font-monospace"> liulh<span class="obfuscate"> @ </span>shmtu edu cn </span> </dd> <dt>History</dt> <dd>2025-04-04: approved</dd> <dd>2025-04-02: received</dd> <dd><a rel="nofollow" href="/archive/versions/2025/599">See all versions</a></dd> <dt>Short URL</dt> <dd><a href="https://ia.cr/2025/599">https://ia.cr/2025/599</a></dd> <dt>License</dt> <dd><a rel="license" target="_blank" href="https://creativecommons.org/publicdomain/zero/1.0/"> <img class="licenseImg" src="/img/license/CC0.svg" alt="No rights reserved" title="No rights reserved"><br> <small>CC0</small> </a> </dd> </dl> </div> </div> <p class="mt-4"><strong>BibTeX</strong> <button id="bibcopy" class="ms-2 btn btn-sm btn-outline-dark" aria-label="Copy to clipboard" onclick="copyBibtex()"> <img src="/img/copy-outline.svg" class="icon">Copy to clipboard</button></p> <pre id="bibtex"> @misc{cryptoeprint:2025/599, author = {Zhengjun Cao and Lihua Liu}, title = {Insecurity of One Decentralized Attribute-based Signature Scheme for Social Co-governance}, howpublished = {Cryptology {ePrint} Archive, Paper 2025/599}, year = {2025}, url = {https://eprint.iacr.org/2025/599} } </pre> <script> var bibcopy; function triggerTooltip() { console.log('setting tooltip'); } window.onload = triggerTooltip; function copyBibtex() { let range = document.createRange(); range.selectNode(document.getElementById('bibtex')); window.getSelection().removeAllRanges(); window.getSelection().addRange(range); document.execCommand('copy'); window.getSelection().removeAllRanges(); let bibcopy = document.getElementById('bibcopy'); let copyTooltip = new bootstrap.Tooltip(bibcopy, {trigger: 'manual', title: 'Copied!'}); copyTooltip.show(); setTimeout(function() { copyTooltip.dispose(); }, 2000); } </script> </main> <div class="container-fluid mt-auto" id="eprintFooter"> <a href="https://iacr.org/"> <img id="iacrlogo" src="/img/iacrlogo_small.png" class="img-fluid d-block mx-auto" alt="IACR Logo"> </a> <div class="colorDiv"></div> <div class="alert alert-success w-75 mx-auto"> Note: In order to protect the privacy of readers, eprint.iacr.org does not use cookies or embedded third party content. </div> </div> <script src="/css/bootstrap/js/bootstrap.bundle.min.js"></script> <script> var topNavbar = document.getElementById('topNavbar'); if (topNavbar) { document.addEventListener('scroll', function(e) { if (window.scrollY > 100) { topNavbar.classList.add('scrolled'); } else { topNavbar.classList.remove('scrolled'); } }) } </script> </body> </html>