List of Publications

Preprints | Conferences | Journals | Workshops | National Conferences | Posters | Theses

Preprints

• [arXiv 2024] The Spectre of Surveillance and Censorship in Future Internet Architectures.
  Michael Wrana, Diogo Barradas, N. Asokan.

• [arXiv 2023] On the Feasibility of Fingerprinting Collaborative Robot Traffic.
  Cheng Tang, Diogo Barradas, Urs Hengartner, Yue Hu.

Refereed Conference Publications

• [IEEE S&P 2025] Anix: Anonymous Blackout-Resistant Microblogging with Message Endorsing.
  Sina Kamali, Diogo Barradas.
  (to appear)

• [CNSM 2024] Signalling Load-aware Conditional Handover in 5G Non-Terrestrial Networks.
  Bohan Zhang, Mohammad A. Salahuddin, Peng Hu, Yunli Wang, Noura Limam, Bo Sun, Diogo Barradas, Raouf Boutaba.
  (to appear)

• [RAID 2024] Extending C2 Traffic Detection Methodologies: From TLS 1.2 to TLS 1.3-enabled Malware.
  Diogo Barradas, Carlos Novo, Bernardo Portela, Sofia Romeiro, Nuno Santos.
  (authors ordered alphabetically)

• [USENIX Security 2024] SpotProxy: Rediscovering the Cloud for Censorship Circumvention.
  Patrick Kon, Sina Kamali, Jinyu Pei, Diogo Barradas, Ang Chen, Micah Sherr, Moti Yung.

• [ICC 2024] Secure and Efficient Group Handover Protocol in 5G Non-Terrestrial Networks.
  Bohan Zhang, Peng Hu, Ahmad Akbari Azirani, Mohammad A. Salahuddin, Diogo Barradas, Noura Limam, Raouf Boutaba.

• [NDSS 2024] Flow Correlation Attacks on Tor Onion Service Sessions with Sliding Subset Sum.
  Daniela Lopes, Jin-Dong Dong, Daniel Castro, Pedro Medeiros, Diogo Barradas, Bernardo Portela, João Vinagre, Bernardo Ferreira, Nicolas Christin, Nuno Santos.
  Best Portuguese Internet Research Award 2024 (ISOC.pt)

• [IEEE S&P 2024] NetShuffle: Circumventing Censorship with Shuffle Proxies at the Edge.
  Patrick Kon, Aniket Gattani, Dhiraj Saharia, Tianyu Cao, Diogo Barradas, Ang Chen, Micah Sherr, Benjamin E. Ujcich.

• [Asia CCS 2022] Stegozoa: Enhancing WebRTC Covert Channels with Video Steganography for Internet Censorship Circumvention.
  Gabriel Figueira, Diogo Barradas, Nuno Santos.

• [TheWebConf 2021] Chinese Wall or Swiss Cheese? Keyword filtering in the Great Firewall of China.
  Raymond Rambert, Zachary Weinberg, Diogo Barradas, Nicolas Christin.

• [NDSS 2021] FlowLens: Enabling Efficient Flow Classification for ML-based Network Security Applications.
  Diogo Barradas, Nuno Santos, Luís Rodrigues, Salvatore Signorello, Fernando Ramos, André Madeira.

• [CCS 2020] Poking a Hole in the Wall: Efficient Censorship-Resistant Internet Communications by Parasitizing on WebRTC.
  Diogo Barradas, Nuno Santos, Luís Rodrigues, Vítor Nunes.

• [USENIX Security 2018] Effective Detection of Multimedia Protocol Tunneling using Machine Learning.
  Diogo Barradas, Nuno Santos, Luís Rodrigues.

• (SECRYPT 2017) Forensic Analysis of Communication Records of Web-based Messaging Applications from Physical Memory.
  Diogo Barradas, Tiago Brito, David Duarte, Nuno Santos, Luís Rodrigues.

Refereed Journal Publications

• [PoPETs 2025] SoK: The Spectre of Surveillance and Censorship in Future Internet Architectures.
  Michael Wrana, Diogo Barradas, N. Asokan. (to appear)

• [PACMNET/CoNEXT 2023] Enhancing the Unlinkability of Circuit-Based Anonymous Communications with k-Funnels.
  Vítor Nunes, José Brás, Afonso Carvalho, Diogo Barradas, Kevin Gallagher, Nuno Santos.

• [PoPETs 2023] DeepSE-WF: Unified Security Estimation for Website Fingerprinting Defenses.
  Alexander Veicht, Cedric Renggli, Diogo Barradas.

• [CoSe 2018] Forensic Analysis of Communication Records of Messaging Applications from Physical Memory.
  Diogo Barradas, Tiago Brito, David Duarte, Nuno Santos, Luís Rodrigues.

• [PoPETs 2017] DeltaShaper: Enabling Unobservable Censorship-resistant TCP Tunneling over Videoconferencing Streams.
  Diogo Barradas, Nuno Santos, Luís Rodrigues.

Refereed Workshop Publications

• (SpaceSec 2024) Connecting the Dots in the Sky: Website Fingerprinting in Low Earth Orbit Satellite Internet.
  Prabhjot Singh, Diogo Barradas, Tariq Elahi, Noura Limam.

• (WPES 2023) A First Look at Generating Website Fingerprinting Attacks via Neural Architecture Search.
  Prabhjot Singh, Shreya Arun Naik*, Navid Malekghaini, Diogo Barradas, Noura Limam. (co-first authors)

• (WPES 2023) TIGER: Tor Traffic Generator for Realistic Experiments.
  Daniela Lopes, Daniel Castro, Diogo Barradas, Nuno Santos.

• (FOCI 2023) Rethinking Realistic Adversaries for Anonymous Communication Systems.
  Kevin Gallagher, Diogo Barradas, Nuno Santos.

• (STAST 2023) Work in Progress: A Glance at Social Media Self-Censorship in North America.
  Wei Hu, Diogo Barradas.

• (WPES 2022) Darwin’s Theory Of Censorship: Analysing the Evolution of Censored Topics with Dynamic Topic Models.
  Asim Waheed, Sara Qunaibi*, Diogo Barradas, Zachary Weinberg. (co-first authors)

• (CPSIoTSec 2022) Stargaze: A LEO Constellation Emulator for Security Experimentation.
  Patrick Tser Jern Kon, Diogo Barradas, Ang Chen.

• (LASER 2021) The Nuts and Bolts of Building FlowLens.
  Diogo Barradas, Nuno Santos, Luís Rodrigues, Salvatore Signorello, Fernando Ramos, André Madeira.

• (DICG 2020) Towards a Scalable Censorship-Resistant Overlay Network based on WebRTC Covert Channels.
  Diogo Barradas, Nuno Santos.

• (ISOC.PT ANRW 2020) On the unobservability of multimedia-based covert channels for Internet censorship circumvention.
  Diogo Barradas, Nuno Santos, Luís Rodrigues.
  Best Research Paper and Internet Impact Acknowledge Mention

• (EuroSys Doctoral Workshop 2018) Assessing the Feasibility of Machine Learning to Detect Network Covert Channels.
  Diogo Barradas.

National Conference Publications

• (INForum 2019 - Portugal) Identificação de Canais Encobertos no Skype usando Esboços em SDNs.
  André Madeira, Diogo Barradas, Nuno Santos, Luís Rodrigues.
  Best Paper Award

• (INForum 2016 - Portugal) Síntese de Vídeo para Evasão de Censura na Internet.
  Diogo Barradas, Nuno Santos, Luís Rodrigues.

Theses

• (PhD. Thesis, 2021) Unobservable Multimedia-based Covert Channels for Internet Censorship Circumvention.
  Diogo Barradas (supervised by Professors Luís Rodrigues and Nuno Santos)

• (MSc. Thesis, 2016) Unobservable Covert Streaming for Internet Censorship Circumvention.
  Diogo Barradas (supervised by Professors Luís Rodrigues and Nuno Santos)

Posters

• (CCS 2022) User Sessions on Tor Onion Services: Can Colluding ISPs Deanonymize Them at Scale?.
  Daniela Lopes, Pedro Medeiros, Jin-Dong Dong, Diogo Barradas, Bernardo Portela, João Vinagre, Bernardo Ferreira, Nicolas Christin, Nuno Santos.