Miden bets on privacy stablecoins with introduction of USDCx
Reported by CoinDesk · AI-assisted summary by ChikoCorp AI News Desk
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Summary
Miden, a California-based zero-knowledge blockchain project, is launching USDCx, a native privacy-focused stablecoin backed 1:1 by USDC held through Circle’s xReserve infrastructure. USDCx transactions will be private by default, allowing users to selectively disclose balance or transaction details to auditors, regulators, or counterparties. The stablecoin is scheduled to debut alongside the Miden mainnet at the end of this month, targeting use cases such as payments, trading, payroll, and corporate treasury.
Why it matters
The introduction of USDCx addresses a significant barrier in institutional finance on public blockchains: the lack of transaction privacy. By providing confidential transactions without sacrificing compliance, USDCx aims to enable businesses and financial institutions to operate onchain without publicly exposing sensitive information such as balances and transaction histories. This development could facilitate broader adoption of crypto payments, trading, and treasury functions in traditional and institutional finance.
Key context
Miden operates as a zero-knowledge blockchain built around client-side proving, where transaction proofs are created on users’ devices rather than exposed to the network, ensuring privacy by default. The stablecoin is issued natively on Miden and backed 1:1 by USDC held via Circle’s xReserve smart contract. Stablecoins like USDC are widely used in crypto as a bridge between traditional money and blockchain assets, supporting faster and more stable transactions than volatile cryptocurrencies. Miden spun out from Polygon in April 2025 and is backed by investors including a16z crypto, 1kx, and Hack VC.
Key numbers and entities
The key entities involved are Miden, Circle Internet (issuer of USDC and provider of xReserve), and investors such as a16z crypto, 1kx, and Hack VC. The expected launch date for USDCx and Miden mainnet is the end of this month (June 2026). No specific numerical financial figures or token quantities were provided.
What remains unclear
The source does not flag open questions but does not provide detailed technical specifications, exact launch dates beyond "end of this month," or further information about regulatory acceptance of the selective disclosure features.