KOHAKU: ETHEREUM'S PRIVACY AND SECURITY TOOLKIT

Summary from the TLDR Crypto newsletter

Kohaku is an open-source SDK and reference wallet led by Nicolas Consigny and Vitalik Buterin focused on privacy and security improvements for Ethereum wallets that will enable future wallets to run "mini Ethereum" inside browsers through Helios lightclient to verify blockchain state without trusting centralized RPC servers. The toolkit targets power users with features including private sends/receives through protocols like Railgun, one unique account per dApp to prevent tracking across applications, peer-to-peer wallet-app communication instead of public servers, private state reading via oblivious servers with TEE+ORAM, post-quantum killswitch with Falcon/Dilithium verifiers, and spending policy limits to prevent phishing and overdegen mistakes. The project represents collaboration among Ethereum's leading privacy teams, including Ambire, Wonderland, Railgun, Helios, PSE, Oblivious Labs, and individual researchers like Micah Zoltu, with a first demo focusing on privacy features at Devcon and future directions exploring native Ethereum browsers for deeper security, local AI transaction scoring, privacy-preserving account abstraction, and native account abstraction implementation over 2026.