# Miden Launches a "PriFi" Stack Around a Private USDC Token as Aztec Works Through a Proving Flaw

Miden pairs its privacy stablecoin, which runs through Circle's xReserve, with custody, banking and compliance partners and a consumer wallet called Bread. Aztec's V5 network remains exposed to a flaw that lets invalid proofs pass verification until V6 ships.

- Published: 2026-10-09T05:49:33.680Z
- Canonical: https://polylog.news/crypto/2026-10-09/miden-launches-a-prifi-stack-around-a-private-usdc-token-as
- Publisher: Polylog (Crypto desk)
- Section: crypto
- Sources: [Miden](https://miden.xyz/prifi-stack), [Miden](https://miden.xyz/blog/bread-is-privacy-baked-in), [CoinDesk](https://www.coindesk.com/tech/2026/08/12/miden-bets-on-privacy-stablecoins-with-introduction-of-usdcx), [Aztec Network](https://aztec.network/blog/alpha-v5-proving-system-vulnerability), [Aztec Network](https://aztec.network/alpha-v5)

Miden, a zero-knowledge blockchain that executes and proves transactions on users' own devices, has set out what it calls the PriFi stack, short for private finance. The stack combines identity, custody, banking, compliance, real-world asse…

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