# Privacy chains pitch selective disclosure as Aztec's undetectable proving bug shows what confidentiality costs

Grayscale argues that artificial intelligence makes Zcash-style shielding necessary and Miden has launched a private-finance stack with built-in compliance tools, while Aztec still cannot say whether its V5 proving flaw was ever exploited.

- Published: 2026-10-08T05:50:08.479Z
- Canonical: https://polylog.news/crypto/2026-10-08/privacy-chains-pitch-selective-disclosure-as-aztec-s-undetec
- Publisher: Polylog (Crypto desk)
- Section: crypto
- Sources: [CoinDesk](https://www.coindesk.com/coindesk-indices/2026/10/07/crypto-long-and-short-zcash-and-the-case-for-privacy-in-the-age-of-ai), [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), [The Defiant](https://thedefiant.io/news/defi/aztec-v4-withdraw-june-25-v5-upgrade-security-vulnerability)

Michael Zhao of Grayscale Research argues in CoinDesk that artificial intelligence has made it cheap to link wallet addresses to the people who control them. Because a blockchain record never expires, every past transaction stays open to th…

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