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

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, 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, 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 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.