The Ethereum Foundation has announced the launch of Kohaku, a new privacy-focused wallet project. Revealed by protocol coordinator Nico on October 9, 2025, Kohaku aims to enhance wallet security and privacy by providing a set of primitives designed to handle private transactions with minimal reliance on trusted third parties. Kohaku is initially available as a software development kit (SDK) for wallets, along with a reference implementation as a browser extension. The project seeks to offer strong privacy and security features, provide a reference wallet for advanced users, and collaborate with other wallet developers to integrate the SDK's capabilities.