Design and Implementation of Work Training Certificate Verification Based On Public Blockchain Platform

The purpose of this research is to develop a job training document storage system based on the public blockchain platform. The use of public platforms is used to secure certificate data making it difficult to falsify. The use of smart contracts is used to form data that will be used in blocks to be sent to the Ethereum blockchain network. The InterPlanetary File System (IPFS) is used to store certificate files in a distributed environment so that access is easy and safe to do. The results showed that certificate data can be stored in public blockchain Ethereum infrastructure and its supporting files stored in the IPFS environment. This means that certificate data is more secure from counterfeiting because it is stored in a distributed and transparent blockchain environment.