TLDR
- Aztec Labs has revived zk.money, a self-custodial privacy wallet that conceals transaction amounts, account balances, and recipient information.
- The relaunched wallet operates on Aztec Network, a privacy-centric Ethereum Layer 2 solution developed by the company.
- Supported deposits include DAI, USDC, and USDT from Ethereum mainnet, with USDC and USDT automatically converted to DAI.
- Transaction limits are set at $2,500 per operation (deposit, payment, or withdrawal), plus a collective $50,000 daily deposit threshold for all users.
- The initial zk.money version debuted in 2021, ceased operations in 2023, and had processed transactions for more than 75,000 wallets.
Aztec Labs has resurrected zk.money, its privacy-oriented cryptocurrency wallet. After discontinuing the service three years ago, the platform has made its comeback on an upgraded infrastructure.
The wallet enables users to conduct cryptocurrency transfers while keeping their account balances and transaction records hidden from public view. This contrasts sharply with standard Ethereum wallets, where blockchain explorers allow anyone to trace complete transaction histories linked to wallet addresses.
Privacy Mechanism Explained
The revived zk.money operates through Aztec Network, an Ethereum Layer 2 scaling solution focused on privacy. After assets are transferred to this network, transaction amounts, account balances, and receiving parties become invisible on the public blockchain.
The platform accepts DAI, USDC, and USDT stablecoin deposits from Ethereum wallets. Upon entry into the system, both USDC and USDT undergo automatic conversion to DAI, making DAI the exclusive currency within the zk.money environment.
According to Aztec Labs, DAI was selected due to its position as the most decentralized stablecoin with substantial adoption. The team indicated that support for additional digital assets may be introduced in future updates.
The platform introduces a user-friendly naming system that eliminates the need for lengthy wallet addresses. Instead of complex alphanumeric strings, users can send funds to readable handles such as bob.zk.money.
This naming functionality leverages Ethereum Name Service infrastructure. The system also empowers users to establish restrictions on who can interact with their personalized handles.
Transparency Limitations
Complete transaction anonymity is not achieved. According to Aztec’s technical documentation, deposits originating from Ethereum still reveal the sender’s address and the transferred amount.
Privacy protection applies only to the recipient within the Aztec Network. This indicates that when funds exit a conventional Ethereum wallet, certain transaction details remain publicly accessible.
The current relaunch implements conservative restrictions. Individual deposits, payments, and withdrawals face a $2,500 ceiling per transaction.
Additionally, a communal daily deposit cap of $50,000 applies across the entire user base, replenishing gradually. Aztec Labs attributes these constraints to the platform’s experimental status and its reliance on cutting-edge cryptographic techniques.
Depositing funds incurs a 35-cent fee plus standard Ethereum gas costs. Withdrawals require a 20-cent charge, while users receive 100 complimentary sponsored transactions daily for internal wallet operations.
The platform incorporates compliance measures by screening Ethereum addresses associated with deposits and withdrawals against sanctions databases. A secure server facilitates wallet operations, though it lacks independent authority to spend user assets.
The first iteration of zk.money went live in 2021 before shutting down in 2023. Aztec Labs explained that the original version lacked the architecture necessary for meaningful expansion and couldn’t accommodate global user demand.
CEO Joe Andrews clarified that the discontinuation wasn’t driven by insufficient user interest. He noted that the intervening years were dedicated to constructing the foundational infrastructure required for privacy-preserving payments at meaningful scale.
This foundational work resulted in Aztec Network, now administered by the independent Aztec Foundation. Aztec Labs continues developing applications, including the new zk.money, built on this network infrastructure.
The company intends to establish connections between zk.money and additional DeFi protocols operating on Ethereum, with these integrations anticipated before year’s end. A mobile application version is also scheduled for the same timeframe, though specific release dates remain unannounced.
Two legacy Aztec smart contracts, associated with separate discontinued products, suffered security breaches in June. Aztec confirmed those contracts existed outside the current network architecture and that the new zk.money platform remained uncompromised.
Aztec Labs has secured $125 million in total funding, including a substantial $100 million financing round in 2022 led by a16z crypto and Paradigm.
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