MasterKey 2.0 is a free Android application developed by TrustVerseDigiFinance that provides users with a secure and convenient way to store and recover private keys for their digital assets. The upgraded version of Master Key 1.0 enables users to store an unlimited number of wallet private keys with no limit in numbers. It also features custom memo functions for each wallet, enabling more detailed wallet management. The app follows a patented ‘System for restoring a lost private key, a safe private key storage, and recovery process (Patent S.Korea), ensuring that the stored private key can only be accessed by the owner who undergoes 3-step authentication and is immediately encrypted and stored on the owner's personal device.