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Intelligence reporting on cybercriminal groups, underground forums and ransomware operations.

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

Dark-web intelligence company publishing monitoring, ransomware and underground-ecosystem analysis.

Intelligence analysis covering illicit communities, ransomware groups and underground online activity.

Longitudinal analysis of topic changes across collected cybercrime-ecosystem discussions.

Public community forum discussing I2P software, services, development and network operations.

Official community forum for Tor users, relay operators, developers and onion-service administrators.

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

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

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

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

Forbidden Stories instructions for submitting documents securely through its verified SecureDrop service.

Community support forum for organizations and developers operating GlobaLeaks whistleblowing sites.

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

Analyst posts on deep- and dark-web activity, threat actors and underground communities.

Analyst articles on darknet communities, ransomware, leak activity and underground intelligence.

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

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

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

News archive covering dark-web leaks, criminal forums, takedowns and ransomware activity.

Technical specifications for Tor protocols, directory formats and onion-service behavior.

Checker for seeing whether a phone number or profile appears in Facebook-related breach data.

Research paper on integrating data from web databases that are not directly indexed by search engines.

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