This work presents a comprehensive study on worldwide nation-state Internet censorship, offering insights into current and emerging censorship methods, changes in censorship trends over the past two decades, and a research framework for continual analysis.
This work presents a system that detects Internet censorship in authoritarian regimes without local endpoints or volunteers. By leveraging non-TCP compliant middleboxes, the system automates the discovery of censorship-triggering packet sequences using Geneva.
This work investigates Russian censorship's collateral damage on transit traffic. Scanning 18 neighboring countries' IP address spaces, the study identifies at least 9 affected countries and 7 responsible autonomous systems, emphasizing the need for global examination of collateral damage.
This work explores the potential of using push notification services for censorship circumvention, presenting two systems, PushRSS and PushProxy, that leverage push notifications as a transport.
Proteus is a censorship circumvention system that enables the expression of new communication protocols through concise specification files. It improves on previous designs by enhancing host safety, supporting multiple protocols, and providing a non-specialist-friendly specification language.
To counter content mismatch attacks by censorship regimes, this work proposes a novel traffic-shaping technique. By modeling normal media content and aligning timing properties, this work approach mitigates distinguishing features in encrypted network traffic, enhancing resistance against such attacks.
This work highlights the limited scope of adversaries considered in traditional anonymity systems and emphasizes the need for new adversaries that reflect real-world conditions.
This paper discusses scalability challenges in the pluggable transports model of Tor and proposes a solution based on running multiple synchronized Tor processes on the bridge host.
This paper introduces server-side censorship evasion, which manipulates packets during a TCP handshake to bypass client-side censorship. It proposes a distributed training model that allows users to contribute to discovering censorship evasion strategies by visiting a website with an unmodified web browser.
The goal of FOCI is to bring together researchers, implementers, and activists working in the area of internet
We recognize that control over online speech has become inherently interdisciplinary, so that studying these
involves adopting a holistic, interdisciplinary perspective.
We aim to catalyze new research directions and in-depth discussions concerning free and open communications on
by providing a space for work that might not fit at conventional computer science measurement and security
We particularly encourage early-stage research or extensions on previously published research.
FOCI will not publish the accepted papers as part of a proceedings, therefore, the authors may submit the work they present at FOCI to other venues. The accepted works at FOCI (e.g., extended abstracts, papers) will be made available online with open access.
There will be two FOCI events this year: an online-only event and an in-person event. Dates and deadlines for both rounds are as follows:
We welcome studies on all aspects of digital speech control. Below are some examples of topics that we consider definitely relevant to FOCI, however we encourage community members to interpret this list broadly and feel free to submit works not specifically listed here.
We welcome the submission of papers containing the following type of content:
For all submissions, the program committee will give greater weight to papers that lend themselves to interactive discussion among workshop attendees.
We offer a variety of paper length options. Submitters may chose the option that best fits their submission:
The page length limits for all submissions do not include references and appendices. Text should be formatted
in two columns on 8.5"x11"
paper using 10-point type on 12-point leading ("single-spaced"), with the text block being no more than 7" x
Text outside the 7" x 9" block will be ignored. Authors are encouraged to use the LaTeX and Word guides from
the USENIX paper templates page.
The review process will be double-blind; all submissions should be anonymized so as not to reveal the authors names or affiliations during the review process. All anonymized papers must be submitted in PDF format via the submission form. Please do not email submissions.
We will update this page with a submission link shortly.
Please don’t hesitate to reach out to us with any questions.
The Free and Open Communications on the Internet (FOCI) community strives to foster a space for rigorous,
challenging intellectual exploration that is at the same time open, inclusive and diverse. We urge FOCI
participants to engage with one another encouragingly and constructively, and especially encourage
to interact with those whose viewpoints, research interests, cultural backgrounds, or experiences may be
unfamiliar to them or outside their comfort zone.
The organizers expect that anyone participating in FOCI will—at minimum—treat others with respect for their dignity and autonomy. Correspondingly, behavior that violates these principles will not be tolerated, and may include consequences up to and including expulsion from FOCI. Anyone who feels threatened or harassed while participating in FOCI should not hesitate to reach out to the FOCI chairs and can expect that any concerns shared will be taken seriously and handled with both discretion and dispatch. The current FOCI chairs are Roya Ensafi and Cecylia Bocovich.