LEDGIS is a user-centered blockchain service, which realizes Self Sovereign Identity (SSI) by preventing IT platforms from monopolizing user data. Through the advanced token economy, users can get paid according to their contribution to the ecosystem and experience various DAPP services at a rate of 3000TPS. In addition, its DID (Decentralized IDentity) is recognized as a global standard, and its efficient private key management service and decentralized data encryption storage/sharing system ensure personal data sovereignty and secure storage of sensitive user information. Recognizing the above advantages, LEDGIS is providing its blockchain services to various government agencies in South Korea.