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Public-interest archive preserving leaked and released datasets for journalism and historical research.

Research service publishing structured ransomware and cybercrime ecosystem tracking data.

Explains how metadata and structured access affect discovery of database-backed and deep-web content.

Identity Theft Resource Center database documenting publicly reported US data compromises.

Analyst reporting on cybercrime marketplaces, underground actors, ransomware and stolen-data trends.

Leak-awareness search page for checking whether identifiers appear in exposed datasets.

CUNY research paper examining automated collection and analysis of dark-web forum data.

Mozilla service that checks email addresses against known breaches and explains protective steps.

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

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

Explains federated searching across government science databases often described as the deep web.

Tor Project hub for technical reports, open research questions, datasets and research safety guidance.