On April 7, Mysten Labs announced that Seal, a decentralized secret management (DSM) service, is now online on Sui Testnet. Seal provides on-chain access control and threshold encryption, designed to address security issues such as encrypted data storage, private messages and content access for Web3 applications. It provides developers with a decentralized, flexible and compatible security solution for any application. Seal's features include on-chain access control implemented through Move smart contracts and threshold encryption for eliminating single point of failure, supporting various application scenarios such as content encryption, game logic, Web3 messages, etc., ensuring that Web3 applications can better protect user data and avoid relying on centralized key management.