Advanced4 lessons

Privacy & Fungibility

Defending the Open Ledger

Chain analysis, mixing, payjoin, and what it takes to keep Bitcoin fungible.

20 min

The heuristics surveillance firms use to deanonymise Bitcoin users.

Collaborative transactions that break the common-input heuristic.

An ordinary-looking transaction that also breaks chain analysis.

Reusable receive identifiers that don't reuse addresses on chain.