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Longitudinal study measuring unique Tor onion services while accounting for mirrors and topology bias.

Terminal monitor for inspecting a local Tor process, circuits, connections and relay activity.

Study of whether website fingerprinting can distinguish and identify Tor onion-service traffic.

Official guides for understanding, deploying and maintaining Tor onion services.

Tor Project documentation portal for onion-service applications, standards and operator tools.

Load-balancing system for resilient Tor onion services, documented by the Tor onion-services team.

Python package that queries several search engines to find indexed Tor onion pages.

Python controller library for applications that monitor or manage Tor processes.

Twisted-based Python library for controlling Tor and building onion-service applications.

Tor add-on that helps onion-service operators reduce guard-discovery and related attacks.

Open-source interface and API project for searching indexed onion content.

Research paper describing large-scale crawling and analysis methods for onion services.

Historical visualization and research record mapping a sample of linked Tor onion services.

Research paper evaluating abuse observed through a controlled honeypot hosted as a Tor onion service.

Open-source utility for gathering public metadata about onion services during authorized research.

Open-source scanner for auditing onion-service metadata and operational security.

Open-source command-line tool that queries multiple onion search engines and exports results.

Research article cataloging ransomware leak sites and explaining how their status is tracked.

Open-source whistleblowing system that lets sources submit documents to newsrooms over Tor.

Official source guide for using verified SecureDrop instances and protecting submission codes.

Open-source research crawler for collecting links and metadata from reachable onion pages.