Tor Network Research
The design of onion routing, the structure of the Tor network, relay and directory operations, known attack classes, and the published literature that has shaped the protocol over two decades.
About
An independent, educational reference on anonymous networks, privacy technology, and the cryptographic foundations that make them possible.
This archive exists to make reliable knowledge about digital privacy and anonymity technology accessible to anyone who wants to understand it. Anonymous networks such as Tor, the cryptographic protocols beneath them, and the tools built on top of them are frequently discussed but rarely explained with care. Our aim is to close that gap with clear, well-sourced material written for students, researchers, journalists, educators, and curious readers alike.
We approach the subject as a field of study rather than a product to promote. Onion routing, end-to-end encryption, metadata resistance, and threat modelling are documented here the way an academic reference would treat them: with attention to how the systems actually work, what guarantees they offer, and where their limitations lie. Where the research community disagrees or evidence is incomplete, we say so plainly instead of resolving the uncertainty for the reader.
Finally, we believe that neutral documentation is itself a public good. Privacy technology is used by a wide range of people for a wide range of lawful reasons, and understanding it should not require specialist training or trust in any single vendor. By collecting explanations, historical context, and references to primary sources in one place, we hope to support informed decision-making and further independent research.
The archive is organised around four broad areas of research and education.
The design of onion routing, the structure of the Tor network, relay and directory operations, known attack classes, and the published literature that has shaped the protocol over two decades.
Documentation of browsers, operating systems, messaging clients, and utilities designed to reduce tracking and data exposure, including how they are configured and what they do not protect against.
Foundational material on cryptography, threat modelling, operational security, and verification practices, written to be approachable without sacrificing technical accuracy.
How location-hidden services are published and reached, the rendezvous and descriptor mechanisms behind them, address formats, and methods for verifying that a service is authentic.
Every article in this archive is checked against primary sources before publication. Where a claim concerns the behaviour of a specific system, we rely on the project's own specifications, source code, and official documentation, supplemented by peer-reviewed research and reputable technical reporting. Secondary commentary is treated as context, not as evidence.
The archive is editorially independent. It is not funded by, affiliated with, or influenced by any software vendor, service operator, or commercial platform, and it does not accept sponsored content. Descriptions of tools are written to explain how they work and what trade-offs they involve, not to recommend one product over another.
Because the field changes quickly, published material is reviewed periodically and revised when protocols, software, or the underlying research evolve. Corrections are made in place, and substantive changes are noted so that readers can see what has been updated. Our working principles are summarised below.
All material in this archive is provided solely for educational and research purposes. It describes how privacy and anonymity technologies function and documents publicly available information about them. Nothing here constitutes legal, security, or professional advice, and the accuracy of any description may be affected by changes to the software or protocols discussed after the date of publication.
This archive is not affiliated with, operated by, or endorsed by any marketplace, service, platform, or organisation, and it does not endorse, facilitate, or encourage any unlawful activity. References to networks, tools, or services are included for descriptive and analytical purposes only. Readers are responsible for ensuring that their own use of any technology described here complies with the laws and regulations applicable in their jurisdiction.