ChainCatcher message, Ethereum co-founder Vitalik Buterin shares a simple privacy roadmap for Ethereum L1. This includes ideas to effectively improve the privacy of Ethereum users without changing Ethereum's consensus, focusing on four types of privacy: on-chain payment privacy, partial anonymization of on-chain activities within applications, on-chain reading privacy, and network anonymity. Solutions include integrating privacy tools like Railgun into wallets, defaulting to "one address per application," implementing FOCIL and EIP-7701, and using TEE and PIR technologies to protect RPC privacy, aiming to enhance user privacy and reduce metadata leakage.