The Blockchain technology is applied to networks between IoTs so that it offers safer and trustful connections and integration systems between devices. It makes mutual authentication between IoT devices and save activation history to be possible on a Private Blockchain. The technology can be applied to smart factory, smart home, smart building, and various IoT industries. Also, Machine Currency for mutual contracts and payments between IoT devices are implemented to bring a platform where rational consumptions and payments are possible. It is also where we can implement Beyond the Human Pay.