# Ethereum Privacy Projects Reframe Confidentiality as the Condition for Banks to Go On-Chain

EthSystems spun out of the Ethereum Foundation to build privacy infrastructure for banks, as Aztec's Alpha V5 network cut private-transaction proving times by more than half.

- Published: 2026-07-29T05:31:19.615Z
- Canonical: https://polylog.news/crypto/2026-07-29/ethereum-privacy-projects-reframe-confidentiality-as-the-con
- Publisher: Polylog (Crypto desk)
- Section: crypto
- Sources: [CoinDesk](https://www.coindesk.com/tech/2026/07/28/ethereum-startup-ethsystems-bets-privacy-is-key-to-getting-banks-on-public-blockchains), [Aztec Network](https://aztec.network/alpha-v5), [Miden](https://miden.xyz/blog/practical-privacy)

A cluster of Ethereum-aligned teams is converging on a single argument. Confidential execution is not a niche feature for dissidents but a prerequisite for regulated institutions to transact on public chains. EthSystems, which [spun out of the Ethereum Foundation this month](https://www.coindesk.com/tech/2026/07/28/ethereum-startup-ethsystems-bets-privacy-is-key-to-getting-banks-on-public-blockchains), is building privacy infrastructure aimed directly at banks and other financial institutions, on the premise that no serious counterparty will settle trades on a ledger where positions and flows are public.

The technology is advancing toward that goal. Aztec's [Alpha V5](https://aztec.network/alpha-v5), a Layer-2 network on Ethereum with a full execution environment for private smart contracts, launched on July 21 after a token-holder governance vote, cutting private-transaction proving times by more than two times and roughly halving the cost of a fully private transaction. Miden, another zero-knowledge project, is [making a parallel case](https://miden.xyz/blog/practical-privacy) that practical, client-side privacy is the missing layer for blockchain's next phase rather than an optional add-on.

The unresolved question is who controls the confidentiality. Bank-facing privacy that ships with viewing keys or selective-disclosure hooks for supervisors is a different product from the censorship-resistant privacy that projects such as Zcash and Monero were built to provide. The current effort leans toward the former, confidentiality that institutions and, where required, regulators can see into, which is what makes it sellable to a compliance department.

## What this means

This is a fork in what privacy on public chains means. Institutional privacy with selective disclosure gains banks and asset managers as users but concedes that a supervisor can unmask flows, while self-sovereign privacy keeps the user in control and keeps regulators out. The channel is product design. The placement of viewing keys decides who is exposed. If bank-grade confidential execution wins, on-chain settlement of real financial assets accelerates, and the privacy-coin thesis of unconditional anonymity narrows to a smaller, more adversarial user base.

## What to watch

- Whether a named bank or asset manager commits to settling on a privacy L2 in production, which would move the institutional pitch from thesis to revenue.
- How selective-disclosure and viewing-key designs are specified, since that determines whether supervisors get a backdoor by default.