Blockchain applied to smart home gateways is a crucial part of data transmission authentication with integrity and confidentiality between devices and other media. Although Smart Home Network has a centralized network form in each Smart Home, it was applied as a centralized to a distributed network by using blockchain at the cloud layer.

A smart home gateway based on the proposed blockchain has three layers, the device layer, gateway layer, and cloud layer. The first layer, device layer, consists of sensors and devices that collect and monitor data in the smart home network environment through various heterogeneous IoTs that are configured in a smart home. The second layer, gateway layer, stores the data generated by the Device Layer and provides it to users as needed. The third layer, the cloud layer, registers the ID for the gateway and the data processed by each gateway in the blockchain. The blocks are shared so that users can be provided with information anytime and anywhere.

For the data to be collected and provided to the user, the collected data undergoes hash value processing and formatting, create blocks, and verifies them periodically to maintain integrity even if data falsification occurs. Data analysis and quality maintenance should be carried out continuously to provide users with only the necessary information.