The purpose of Hdac is to support IoT Contract in order to use smart environment safely. We aim for Hybrid-Blockchain that operates both Public and Private (Permissioned) environments, based on blockchain technology. In order to overcome the security vulnerability of Private, the Permissioned blockchain, we are researching and developing a blockchain that can be implemented in ASM and Safe IP System for Mutual IoT devices, IoT contract, and Micro-Payment. Also, we want to lead the transaction innovation with our eco-partners who participate in Hdac with various technologies as well as expanding our business by building real cases.