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Protocol and API documentation for Tor relay and bridge status data used by network tools.

Tor measurement project collecting performance data for public relays, bridges and onion services.

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

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

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

Network test that checks whether Tor access appears blocked and contributes measurement data.

Independent dashboard analyzing Tor relay operators, concentration and network diversity.

Cybernews checker for seeing whether an email or phone appears in known data leaks.

ProPublica instructions for submitting documents securely through its verified SecureDrop service.

RAND study of illicit online markets and the operational lessons they present for public policy.

Open-source ransomware monitoring project indexing group posts for defensive research.

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

Open-source tracker monitoring ransomware leak sites and publishing structured status data.

Research covering cybercriminal communications, darknets, underground forums and financial crime.

University guide to finding databases and information that ordinary search engines do not index.

Research and explainers on dark-web investigations, criminal forums and threat-intelligence methods.

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

Official directory of active, verified SecureDrop instances operated by news and advocacy organizations.

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

Reporting archive on dark-web crime, underground forums, data leaks and law-enforcement actions.

WikiLeaks archive for searching the Sony email release and related historical documents.

Stefania Maurizi instructions for submitting documents securely through its verified SecureDrop service.

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

Süddeutsche Zeitung instructions for submitting documents securely through its verified SecureDrop service.