The dYdX Foundation has announced the official launch of Permissioned Keys, providing API traders with greater security, control and risk management capabilities, especially for institutions and market makers. This feature allows accounts to be assigned different permissions, such as restricting withdrawals, specifying tradable markets, managing sub-accounts, etc., to improve account security and operational flexibility. According to the official content, Permissioned Keys is only suitable for API transactions, supports multi-key management, whitelisted trade pair settings, and prevents unauthorized fund transfers. Although leverage limits or trade size limits for unfilled orders are not currently supported, future versions may add more risk management features.