In many companies and organizations around the world, user’s identity data is stored and handled in centralized systems rather than decentralized ones. A centralized system comes with many risks, such as data leaks or users not being in control of their data. These problems can be fixed by using a decentralized system known as the Self-Sovereign Identity (SSI) system. SSI system is a user-centric system that lets users manage and control their own identity data. In an SSI system, there are three main actors, which are the user called the holder, the issuer who issues credentials to the user, and the verifier who checks the credentials presented by the user. However, SSI system is not perfect since it has the problem of not knowing whether the credential information that the user provides is authentic or not. Since credentials can be issued by any issuers in the SSI system, there needs to be an established trust between the verifier and the issuer. Therefore, the solution to improving trust within the SSI system is to implement a model called the reputation system. This proposed reputation system will determine if an issuer can be trustworthy. To establish robust security protocols within the system, it also needs to have a secured storage system. This can be achieved by leveraging blockchain technology for storing reputation data. The framework that is used to build the blockchain network in this reputation system is called Hyperledger Fabric. Using this proposed reputation system can ensure data authenticity and transparency.