Key takeaways
- The Sterlingov ruling treats each mixer deposit as support for a wider criminal conspiracy pool.
- Roman Storm wrote open-source Tornado Cash code, unlike Roman Sterlingov's custodial Bitcoin Fog operation model.
- Treasury withdrew its mixer rule while the SDNY used a precedent with broader privacy consequences.
The Southern District of New York used the Sterlingov ruling as precedent in the case involving Roman Storm, a Tornado Cash developer. The ruling treated deposits into a mixer as furthering a criminal conspiracy because each deposit enlarged the pool that obscured identities.
Roman Sterlingov, a Bitcoin Fog operator, personally ran a centralized, custodial mixer. Roman Storm wrote open-source, non-custodial Tornado Cash smart contract code.
A Deposit Becomes Part of the Conspiracy
The Sterlingov reasoning did not stop at Bitcoin Fog's operator. It treated every deposit into the mixer as support for the conspiracy because more funds made the common pool larger and the identities behind transactions harder to trace. That logic moves the alleged criminal act away from operating a custodial service and toward participation in the privacy set itself.
The claim that this reasoning could criminalize all mixer transactions is analysis, not an established legal outcome. The pending question is whether prosecutors can carry the Bitcoin Fog reasoning into a case involving non-custodial Tornado Cash code.
The Custody Distinction
Bitcoin Fog was centralized and custodial, and Sterlingov personally operated it. Tornado Cash used open-source, non-custodial smart contracts written by Storm. The factual difference is control: one operator held and managed a custodial service, while the other developer wrote code that users could execute without handing him custody.
Using the Sterlingov precedent against Storm stretches conduct from running a custodial mixer toward publishing non-custodial privacy software. The custodial Bitcoin Fog and non-custodial Tornado Cash distinction remains explicit. A court must still decide how far conspiracy liability can travel beyond an operator.
A Privacy Rule Withdrawn, a Venue Argument Filed
The Treasury withdrawal and the SDNY venue argument fit a wider pattern of government hostility to financial privacy. The formal rule and the court argument are different legal paths, but both put privacy tools and their users under sharper scrutiny.
The broader risk is a legal incentive that favors traceable financial behavior. If deposits that enlarge a privacy pool support a conspiracy argument, ordinary users face pressure before a court resolves the pending legal question.
Why It Matters
Bitcoin privacy supports sovereignty because money without practical privacy invites surveillance and government hostility to financial privacy. The Sterlingov reasoning rewards gatekeepers who can monitor and censor, while users and open-source developers absorb risk when mixer deposits become conspiracy support. The custodial Bitcoin Fog and non-custodial Tornado Cash distinction must remain explicit because operating a service is not the same act as publishing code. Bitcoin users win when courts preserve that distinction; surveillance incumbents win when every privacy participant becomes easier to threaten.
