Glossary term
Deep web vs dark web
Definition
The deep web is everything search engines do not index: databases, paywalled and private content. The dark web is the deliberately hidden subset reachable only through overlay networks such as Tor, I2P, Freenet, and Lokinet. Investigating either lawfully requires controlled attribution, documented collection, and verification.
In practice
The confusion is near-universal. A paywalled news archive is deep web; a Tor hidden service selling stolen data is dark web. The difference is the access model, not the danger.
Most of the deep web is mundane and legitimate — webmail, intranets, records behind search forms. The dark web is a small, deliberate slice built to resist observation, and reaching it lawfully is the easy part; attribution and preservation are the hard parts.
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