The practice is compartmentalization: separate identities, devices, payment routes, and schedules for separate activities, with nothing reusable across compartments. Failures are usually cross-contamination events, such as one payment, login, or handle bridging two contexts.
Tools implement compartments but do not maintain them; consistency over time does. The linked articles document the failure patterns that actually deanonymize people.
Related reading
- How to Vet Any Privacy Tool Before You Trust It
- Financial Privacy for Journalists, Activists & Dissidents