Ethereum Foundation Highlights Wallet Protocols for Enhanced Privacy
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The Kohaku SDK aims to make private transactions a default wallet feature, rather than a specialist add-on. The Ethereum Foundation wants to ensure privacy is accessible to all, not just power users. In a recent post, they emphasize the potential of formally verified, open-source wallet protocols to bring Ethereum's guarantees to users through enhanced privacy.
What Kohaku Offers
Kohaku is an open-source software development kit paired with a reference wallet, designed to enable ordinary wallets to offer shielded transactions without requiring users to become expert cryptographers. Its features include:
- Private sends and receives: Users can receive funds at unique, one-off addresses, enhancing anonymity.
- Stealth addresses: These ensure payments to the same person cannot easily be linked on-chain.
- Isolated accounts: Activity in one decentralized application (dapp) remains separate from others, making it harder to piece together a complete user profile.
- Integrations: Kohaku supports established privacy tools like Railgun, Privacy Pools, and Tornado Cash, enabling shielded balances and unlinkable user activity.
- Light clients and private state reads: Protection extends beyond transactions, ensuring user privacy when checking balances or querying the chain.
- Post-quantum security: Designed to withstand future computational threats.
The CROPS Framework
The Ethereum Foundation structures its efforts around the acronym CROPS:
- Censorship Resistance: Ensuring users remain in control of their data.
- Capture Resistance: Protecting user identities and activities.
- Open Source: Promoting transparency and community involvement.
- Privacy: Enhancing user privacy through various protocols and tools.
- Security: Building robust, secure systems to safeguard user funds and identities.
This framework aligns with the Foundation's Mandate and the importance of formal verification and open-source code in wallet tooling.
Development and Future Steps
While some SDK components, like shielded balances and automatic stealth addresses, are still in development, a live demonstration is scheduled for November 3, 2026, during Devcon. Ethereum co-founder Vitalik Buterin and EF researcher Nicolas Consigny are expected to participate. Ambire Wallet will showcase Kohaku integrations at this event.
The Ethereum Foundation's Privacy Stewards of Ethereum (PSE) have been working on privacy initiatives since 2018, and they established a formalized privacy roadmap in March 2026. This roadmap includes priorities like private reads and writes, as well as protocol-level changes like EIP-8141 Frame Transactions, planned for the Hegotá upgrade.
The inclusion of Tornado Cash as a supported integration is notable, as it may influence how wallets present privacy protocols to users. The Devcon demo and progress on EIP-8141 and the Hegotá upgrade will be key indicators of the Ethereum Foundation's privacy agenda's scope and impact.