Ethereum co-founder Vitalik Buterin transferred 50.25 ETH — roughly $113,000 — through Privacy Pools this week, marking the highest-profile transaction yet on the compliance-aware privacy protocol. The move puts a spotlight on a tool designed to offer privacy without running afoul of sanctions, a line that regulators have drawn sharply since the Tornado Cash crackdown.
The transaction
Buterin moved the ether into Privacy Pools, a protocol built on zero-knowledge proofs that lets users prove a withdrawal came from an "approved association set" without revealing their identity. The system was co-authored by Buterin in a 2023 research paper and launched on Ethereum mainnet by 0xbow.io on March 31, 2025. Initial deposits are capped at 1 ETH per address — a deliberate limit meant to keep small users safe while discouraging large-scale money movement.
How Privacy Pools differs from Tornado Cash
The contrast with Tornado Cash is stark. That mixer was sanctioned by OFAC in August 2022, in part because it offered no selectivity — any deposit could mix with any other, making it a haven for illicit funds. Privacy Pools uses an "association set" that users can choose, allowing compliance with know-your-customer rules while still shielding individual identities. The protocol's launch week saw more than 21 ETH across 69 individual deposits, a healthy start for a tool that's still finding its footing.
Backing and roadmap
0xbow has attracted notable backers: Number Group, BanklessVC, Public Works, and Coinbase Venture are all in. The roadmap includes extending support for ERC-20 assets beyond ETH, plus integrating wallet and compliance dashboard tooling. That last piece matters — regulators have made clear they expect privacy tools to have built-in guardrails, not just a disclaimer.
Regulatory backdrop
This test comes as the CLARITY Act faces more than 100 amendments in Congress, with lawmakers wrestling over how to regulate digital asset privacy tools. Buterin's own transaction doesn't settle the debate, but it does show that the technology can work without triggering OFAC red flags — at least for now. Whether lawmakers see it that way is another question.
