I am researching and designing permissioned blockchain system architecture and scenarios. In addition, I am building the prototype of blockchain system, using Hyperledger Fabric, for medical information sharing based on the proposed system scenarios.I created blockchain system using Java programming language for building a blockchain API and Go programming language for testing several chaincodes. Since blockchain system cannot stand alone for preserving the personal privacy, we adapt public key infrastructure (PKI) and cryptographic schemes such as symmetric encryption and re-encryption on the medical records. ©