Cost and privacy breaches have always been pain points. MystenLabs recently launched Seal, a data permissions system, on the Sui mainnet, attempting to provide a solution. While Seal supports scenarios such as fan content distribution, contract management, and authorization of private datasets, it still faces potential risks such as key network dependency and contract vulnerabilities. This issue of @Web3Caff_Res will focus on Seal's technical path, application potential, and challenges.