Aztec Revives zk.money for Private Stablecoin Payments on Ethereum
Aztec Labs has relaunched zk.money, a self-custodial wallet that lets users send USDC, USDT and DAI privately on its Ethereum layer 2, hiding amounts and recipients on-chain, but capping each transfer at $2,500 as a risk control.
What Aztec Relaunched
Relaunched on 29 September, zk.money uses zero-knowledge proofs to let users send stablecoins without exposing amounts or recipient identities on-chain, adopting ENS-style names like bob.zk.money. Deposits and withdrawals remain visible on Ethereum and are screened against sanctions policies.
The caps are deliberate: each transfer is limited to $2,500 and all users share a $50,000 daily deposit limit. Aztec launched before deploying fixes for a critical vulnerability found in its Alpha V5 proving system, so the limits contain potential losses if a fault and an enclave compromise coincided.
The Backstory
The original zk.money launched in 2021, drew more than 75,000 wallets and processed $100 million before sunsetting in 2023. 'We sunset in 2023, not because private payments were a failed thesis, but because they needed infrastructure that did not yet exist,' said CEO Joe Andrews.
Fees are minimal, roughly $0.55 per cycle, with 100 sponsored daily transactions, a design meant to make private payments feel like normal ones.
Our Read: Privacy's Uneasy Comeback
Financial privacy is a legitimate need, yet on public blockchains every transaction is visible by default, a surveillance problem most users never signed up for. zk.money answers a real demand.
But privacy tools live under a regulatory cloud after sanctions against mixers like Tornado Cash. Aztec's approach, sanctions-screened deposits and withdrawals with low caps, is an attempt to thread the needle between privacy and compliance, and it will be watched closely.
Why It Matters Beyond Crypto
As stablecoins go mainstream in payments, the privacy question moves with them. Businesses paying suppliers or salaries on-chain do not necessarily want every counterparty and amount public forever.
zk.money is an early test of whether compliant, confidential stablecoin payments are possible. If they are, private on-chain payments could become a serious business tool; if regulators balk, it is a preview of the fights ahead.
Quick FAQ
What is zk.money?
A self-custodial Aztec wallet that uses zero-knowledge proofs to send USDC, USDT and DAI on Ethereum's layer 2 while hiding transaction amounts and recipient identities on-chain.
Why is there a $2,500 transfer cap?
It is a risk control. zk.money relaunched before fixes for a critical Alpha V5 vulnerability were deployed, so per-transfer and daily-deposit limits cap potential losses.
Is zk.money compliant?
Deposits and withdrawals stay visible on Ethereum and are screened against sanctions policies, an attempt to balance privacy with compliance, though privacy tools remain under regulatory scrutiny.
Privacy is a real need, because on a public blockchain every payment you make is visible forever, but privacy tools live under a regulatory cloud after Tornado Cash. Aztec threading the needle with sanctions screening and low caps is the experiment worth watching, because as stablecoins go mainstream, the privacy question comes with them. — Daniel Nikolla, Founder of Merx Marketing
As stablecoin payments go mainstream, confidentiality becomes a business requirement, and whether it can be delivered compliantly is one of crypto's defining fights.
Should on-chain payments be private by default? Tell us where you land on privacy versus transparency.
If you would like to know more about this topic, please contact us on danieln@merxmarketing.co.uk
Sources: The Block, Unchained and CoinDesk.
Related reading
Written by Daniel Nikolla, Founder of Merx Marketing Ltd and Marketing Minute
Comments