Checker for seeing whether an email appears in the historical Ashley Madison breach dataset.
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Historical lookup showing whether an IP address appeared as a Tor relay on a specified date.
Checker for seeing whether a phone number or profile appears in Facebook-related breach data.
Public breach-awareness service for checking whether an email address appears in known data breaches.
Leak-awareness search page for checking whether identifiers appear in exposed datasets.
Exposure checker for seeing whether a password or email appears in known breach data.
Tor Project documentation portal for onion-service applications, standards and operator tools.
Network test that checks whether Tor access appears blocked and contributes measurement data.
Cybernews checker for seeing whether an email or phone appears in known data leaks.
Python controller library for applications that monitor or manage Tor processes.
Official page that tests whether the current connection appears to be using the Tor network.
Twisted-based Python library for controlling Tor and building onion-service applications.
Explains how metadata and structured access affect discovery of database-backed and deep-web content.
National Academies chapter explaining deep-web content, discovery limits and information retrieval.
Official Tor service distributing bridge relay addresses to users facing network blocking.
National Transportation Library record for research on discovering and cataloging hidden-web resources.
Guide to search tools and databases that surface information outside conventional web indexes.
ERIC record for a guide to finding specialized databases and other web content missed by search engines.
Open-source research crawler for collecting links and metadata from reachable onion pages.
Tor add-on that helps onion-service operators reduce guard-discovery and related attacks.
Federated search portal querying science databases and repositories across many countries.