NDSS 2025 – Impact Tracing: Identifying The Culprit Of Misinformation In Encrypted Messaging Systems
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<p>Session 7C: Secure Protocols</p><p></p><center data-preserve-html-node="true"><iframe allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen="" src="https://www.youtube-nocookie.com/embed/F3pTm5Z-MPg?si=9mYlolPQ0MzX1Eeb" width="560" frameborder="0" data-preserve-html-node="true" title="YouTube video player" height="315"></iframe> <p></p><center data-preserve-html-node="true">Authors, Creators & Presenters: Zhongming Wang (Chongqing University), Tao Xiang (Chongqing University), Xiaoguo Li (Chongqing University), Biwen Chen (Chongqing University), Guomin Yang (Singapore Management University), Chuan Ma (Chongqing University), Robert H. Deng (Singapore Management University) <p></p><center data-preserve-html-node="true">PAPER<br> <center data-preserve-html-node="true">Impact Tracing: Identifying the Culprit of Misinformation in Encrypted Messaging Systems <p></p><center data-preserve-html-node="true">Encrypted messaging systems obstruct content moderation, although they provide end-to-end security. As a result, misinformation proliferates in these systems, thereby exacerbating online hate and harassment. The paradigm of “Reporting-then-Tracing” shows great potential in mitigating the spread of misinformation. For instance, (message traceback) (CCS’19) traces all the dissemination paths of a message, while (source tracing) (CCS’21) traces its originator. However, message traceback lacks privacy preservation for non-influential users (e.g., users who only receive the message once), while source tracing maintains privacy but only provides limited traceability. In this paper, we initiate the study of (impact tracing). Intuitively, impact tracing traces influential spreaders central to disseminating misinformation while providing privacy protection for non-influential users. We introduce noises to hide non-influential users and demonstrate that these noises do not hinder the identification of influential spreaders. Then, we formally prove our scheme’s security and show it achieves differential privacy protection for non-influential users. <hr> <p></p><center data-preserve-html-node="true">ABOUT NDSS<br> <center data-preserve-html-node="true">The Network and Distributed System Security Symposium (NDSS) fosters information exchange among researchers and practitioners of network and distributed system security. The target audience includes those interested in practical aspects of network and distributed system security, with a focus on actual system design and implementation. A major goal is to encourage and enable the Internet community to apply, deploy, and advance the state of available security technologies. <hr> <p>Our thanks to the <a href="https://www.ndss-symposium.org/">Network and Distributed System Security (NDSS) Symposium</a> for publishing their Creators, Authors and Presenter’s superb <a href="https://www.youtube.com/@NDSSSymposium">NDSS Symposium 2025 Conference</a> content on the <a href="https://www.ndss-symposium.org/">Organizations’</a> <a href="https://youtube.com/@ndsssymposium?si=lLtn9sVVEwmZ8J9h3">YouTube Channel</a>. </p> <p></p></center></center></center></center></center></center></center><p><a href="https://www.infosecurity.us/blog/2025/12/31/ndss-2025-impact-tracing-identifying-the-culprit-of-misinformation-in-encrypted-messaging-systems">Permalink</a></p><p> </p><div class="spu-placeholder" style="display:none"></div><div class="addtoany_share_save_container addtoany_content addtoany_content_bottom"><div class="a2a_kit a2a_kit_size_20 addtoany_list" data-a2a-url="https://securityboulevard.com/2025/12/ndss-2025-impact-tracing-identifying-the-culprit-of-misinformation-in-encrypted-messaging-systems/" data-a2a-title="NDSS 2025 – Impact Tracing: Identifying The Culprit Of Misinformation In Encrypted Messaging Systems"><a class="a2a_button_twitter" href="https://www.addtoany.com/add_to/twitter?linkurl=https%3A%2F%2Fsecurityboulevard.com%2F2025%2F12%2Fndss-2025-impact-tracing-identifying-the-culprit-of-misinformation-in-encrypted-messaging-systems%2F&linkname=NDSS%202025%20%E2%80%93%20Impact%20Tracing%3A%20Identifying%20The%20Culprit%20Of%20Misinformation%20In%20Encrypted%20Messaging%20Systems" title="Twitter" rel="nofollow noopener" target="_blank"></a><a class="a2a_button_linkedin" href="https://www.addtoany.com/add_to/linkedin?linkurl=https%3A%2F%2Fsecurityboulevard.com%2F2025%2F12%2Fndss-2025-impact-tracing-identifying-the-culprit-of-misinformation-in-encrypted-messaging-systems%2F&linkname=NDSS%202025%20%E2%80%93%20Impact%20Tracing%3A%20Identifying%20The%20Culprit%20Of%20Misinformation%20In%20Encrypted%20Messaging%20Systems" title="LinkedIn" rel="nofollow noopener" target="_blank"></a><a class="a2a_button_facebook" href="https://www.addtoany.com/add_to/facebook?linkurl=https%3A%2F%2Fsecurityboulevard.com%2F2025%2F12%2Fndss-2025-impact-tracing-identifying-the-culprit-of-misinformation-in-encrypted-messaging-systems%2F&linkname=NDSS%202025%20%E2%80%93%20Impact%20Tracing%3A%20Identifying%20The%20Culprit%20Of%20Misinformation%20In%20Encrypted%20Messaging%20Systems" title="Facebook" rel="nofollow noopener" target="_blank"></a><a class="a2a_button_reddit" href="https://www.addtoany.com/add_to/reddit?linkurl=https%3A%2F%2Fsecurityboulevard.com%2F2025%2F12%2Fndss-2025-impact-tracing-identifying-the-culprit-of-misinformation-in-encrypted-messaging-systems%2F&linkname=NDSS%202025%20%E2%80%93%20Impact%20Tracing%3A%20Identifying%20The%20Culprit%20Of%20Misinformation%20In%20Encrypted%20Messaging%20Systems" title="Reddit" rel="nofollow noopener" target="_blank"></a><a class="a2a_button_email" href="https://www.addtoany.com/add_to/email?linkurl=https%3A%2F%2Fsecurityboulevard.com%2F2025%2F12%2Fndss-2025-impact-tracing-identifying-the-culprit-of-misinformation-in-encrypted-messaging-systems%2F&linkname=NDSS%202025%20%E2%80%93%20Impact%20Tracing%3A%20Identifying%20The%20Culprit%20Of%20Misinformation%20In%20Encrypted%20Messaging%20Systems" title="Email" rel="nofollow noopener" target="_blank"></a><a class="a2a_dd addtoany_share_save addtoany_share" href="https://www.addtoany.com/share"></a></div></div><p class="syndicated-attribution">*** This is a Security Bloggers Network syndicated blog from <a href="https://www.infosecurity.us/">Infosecurity.US</a> authored by <a href="https://securityboulevard.com/author/0/" title="Read other posts by Marc Handelman">Marc Handelman</a>. Read the original post at: <a href="https://www.infosecurity.us/">https://www.infosecurity.us/</a> </p>