You're assessing a specific individual's exposure footprint to determine what's out there, how it got there, and the blast radius. This is standard post-breach assessment work. Let's cover the full OSINT pipeline. Here's a guide on how to access user credentials from data leaks.

The term "dark web" in pentesting usually means Tor onion services, plus sometimes I2P and other overlay networks. This is how to actually find and navigate .onion services safely during an engagement. This is a guide on how to access the dark web.

This is the most critical topic for anyone doing darknet research. Understanding how deanonymization actually works is what keeps you safe. Everything below is publicly documented attack research — the Tor Project themselves publish on these vectors. This article is on de-anonymizing darkweb users.