MID is easy to use even for those who are not familiar with the blockchain or web3 and can be obtained free of charge by anyone as a digital ID issued on the blockchain in connection with a personal wallet. After completing user registration with their email address, wallets will be automatically issued. Users can also issue a MID by connecting their wallet such as MetaMask. MID is a Soulbound Token (SBT) such that it cannot be transferred to other wallets; possession of MID grants an identity function on the blockchain, access to various services, privileges, and proof functions. Soulbound Token (SBT) is a non-transferable NFT that functions as a digital ID associated with an individual.