darpa.mil
DARPA research program that developed domain-specific search methods for hard-to-index web content.
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arxiv.org
Research paper describing large-scale crawling and analysis methods for onion services.
slcyber.io
Research and explainers on dark-web investigations, criminal forums and threat-intelligence methods.
spec.torproject.org
Technical specifications for Tor protocols, directory formats and onion-service behavior.
gitlab.torproject.org
Official source repository for the Tor network daemon and core protocol implementation.
metrics.torproject.org
Protocol and API documentation for Tor relay and bridge status data used by network tools.