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User reporting is an essential component of content moderation on many online platforms -- in particular, on end-to-end encrypted (E2EE) messaging platforms where platform operators cannot proactively inspect message contents. However,…

Human-Computer Interaction · Computer Science 2023-06-21 Leijie Wang , Ruotong Wang , Sterling Williams-Ceci , Sanketh Menda , Amy X. Zhang

Popular messaging applications now enable end-to-end-encryption (E2EE) by default, and E2EE data storage is becoming common. These important advances for security and privacy create new content moderation challenges for online services,…

Cryptography and Security · Computer Science 2023-03-08 Sarah Scheffler , Jonathan Mayer

In this paper, we assess existing technical proposals for content moderation in End-to-End Encryption (E2EE) services. First, we explain the various tools in the content moderation toolbox, how they are used, and the different phases of the…

Cryptography and Security · Computer Science 2022-02-10 Seny Kamara , Mallory Knodel , Emma Llansó , Greg Nojeim , Lucy Qin , Dhanaraj Thakur , Caitlin Vogus

In the era of social media and messaging applications, people are becoming increasingly aware of data privacy issues associated with such apps. Major messaging applications are moving towards end-to-end encryption (E2EE) to give their users…

Cryptography and Security · Computer Science 2021-08-02 Raman Singh , Ark Nandan Singh Chauhan , Hitesh Tewari

Encrypted messaging services like WhatsApp, Facebook Messenger, and Signal provide secure and deniable communication for billions across the world, but these exact properties prevent holding users accountable for sending messages that are…

Cryptography and Security · Computer Science 2023-06-05 Alistair Pattison , Nicholas Hopper

Electronic government (e-government) uses information and communication technologies to deliver public services to individuals and organisations effectively, efficiently and transparently. E-government is one of the most complex systems…

Cryptography and Security · Computer Science 2020-06-26 Noe Elisa , Longzhi Yang , Fei Chao , Yi Cao

Governance in online communities is an increasingly high-stakes challenge, and yet many basic features of offline governance legacies--juries, political parties, term limits, and formal debates, to name a few--are not in the feature-sets of…

Computers and Society · Computer Science 2021-03-16 Nathan Schneider , Primavera De Filippi , Seth Frey , Joshua Z. Tan , Amy X. Zhang

Platforms are increasingly adopting industrial models of moderation that prioritize scalability and consistency, frequently at the expense of context-sensitive and user-centered values. Building on the multi-level governance framework that…

Human-Computer Interaction · Computer Science 2025-09-09 Juhoon Lee , Bich Ngoc Doan , Jonghyun Jee , Joseph Seering

We provide enhanced security against insider attacks in services that manage extremely sensitive data. One example is a #MeToo use case where sexual harassment complaints are reported but only revealed when another complaint is filed…

Cryptography and Security · Computer Science 2018-08-09 Danny Harnik , Paula Ta-Shma , Eliad Tsfadia

Social platforms have revolutionized information sharing, but also accelerated the dissemination of harmful and policy-violating content. To ensure safety and compliance at scale, moderation systems must go beyond efficiency and offer…

Computation and Language · Computer Science 2026-01-09 Anqi Li , Wenwei Jin , Jintao Tong , Pengda Qin , Weijia Li , Guo Lu

This paper outlines an approach for IEEE to take leadership for digital privacy to align many existing IEEE Societies and efforts in the areas of computer systems & applications security, organizational & global architectures,…

Cryptography and Security · Computer Science 2021-03-30 Christopher Gorog

This paper aims to survey various techniques utilized for content moderation in end-to-end encryption systems. We assess the challenging aspect of content moderation: maintaining a safe platform while assuring user privacy. We study the…

Cryptography and Security · Computer Science 2025-01-31 Chaitanya Rahalkar , Anushka Virgaonkar

Message franking is an indispensable abuse mitigation tool for end-to-end encrypted (E2EE) messaging platforms. With it, users who receive harmful content can securely report that content to platform moderators. However, while real-world…

Cryptography and Security · Computer Science 2025-07-28 Armin Namavari , Thomas Ristenpart

The proliferation of social media platforms and online communities has inadvertently catalyzed the spread of cyberbullying, hate speech, and other forms of online toxicity, making the effective governance of such harm a critical societal…

Artificial Intelligence · Computer Science 2026-05-28 Yiting Huang , Wenting Zhu , Zekun Wang , Qingpo Yang , Yakai Chen , Zihui Xu , Yueyue Zhang , Sanchuan Guo , Xi Zhang

Many have criticized the centralized and unaccountable governance of prominent online social platforms, leading to renewed interest in platform governance that incorporates multiple centers of power. Decentralization of power can arise…

Human-Computer Interaction · Computer Science 2023-10-02 Shagun Jhaver , Seth Frey , Amy Zhang

Online community moderators are on the front lines of combating problems like hate speech and harassment, but new modes of interaction can introduce unexpected challenges. In this paper, we consider moderation practices and challenges in…

Human-Computer Interaction · Computer Science 2021-01-14 Jialun Aaron Jiang , Charles Kiene , Skyler Middler , Jed R. Brubaker , Casey Fiesler

Homomorphic encryption, secure multi-party computation, and differential privacy are part of an emerging class of Privacy Enhancing Technologies which share a common promise: to preserve privacy whilst also obtaining the benefits of…

Human-Computer Interaction · Computer Science 2021-01-21 Nitin Agrawal , Reuben Binns , Max Van Kleek , Kim Laine , Nigel Shadbolt

E-governance is a process that aims to enhance a government's ability to simplify all the processes that may involve government, citizens, businesses, and so on. The rapid evolution of digital technologies has often created the necessity…

Cryptography and Security · Computer Science 2022-03-17 Owen Lo , William J. Buchanan , Sarwar Sayeed , Pavlos Papadopoulos , Nikolaos Pitropakis , Christos Chrysoulas

Billions of secure messaging users have adopted end-to-end encryption (E2EE). Nevertheless, challenges remain. Most communication applications do not provide E2EE, and application silos prevent interoperability. Our qualitative analysis of…

Cryptography and Security · Computer Science 2023-11-03 Tarun Yadav , Austin Cook , Justin Hales , Kent Seamons

Network-level privacy is the Achilles heel of financial privacy in cryptocurrencies. Financial privacy amounts to achieving and maintaining blockchain- and network-level privacy. Blockchain-level privacy recently received substantial…

Cryptography and Security · Computer Science 2023-06-28 Ferenc Béres , István András Seres , Domokos M. Kelen , András A. Benczúr
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