# Miden launches a private self-custody wallet while Aztec waits on a proving-system fix it found in July

Miden says its "PriFi stack" makes privacy the default for on-chain finance, while Aztec's V5 network still runs with an acknowledged flaw that lets an invalid proof pass verification.

- Published: 2026-10-12T05:41:53.098Z
- Canonical: https://polylog.news/crypto/2026-10-12/miden-launches-a-private-self-custody-wallet-while-aztec-wai
- Publisher: Polylog (Crypto desk)
- Section: crypto
- Sources: [Miden](https://miden.xyz/prifi-stack), [Miden](https://miden.xyz/blog/bread-is-privacy-baked-in), [Aztec Network](https://aztec.network/blog/alpha-v5-proving-system-vulnerability), [Aztec Network](https://aztec.network/alpha-v5), [arXiv cs.CR](https://arxiv.org/abs/2610.12535), [Unchained](https://unchainedcrypto.com/aztec-revives-its-private-payments-wallet-capping-every-transfer-below-2500/)

Miden, a zero-knowledge (ZK) rollup project, announced what it calls the PriFi stack, short for private digital finance. Its first consumer product is Bread, a self-custodial wallet. Miden says Bread puts "seven years of privacy engineering…

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