Blockchain-Based Privacy Protection for IOT Devices in Smart Communities

Thanks to the spread of IOT technology, IOT is becoming more and more common in business and people's daily life. Smart buildings are a huge area of IOT research and application. Modern cities cannot be built without the benefits brought by IOT, including speed, security and low cost. This paper focuses on security and privacy issues in IOT, especially in the area of smart communities (community access control systems), where the massive collection and excessive misuse of personal data has created many new needs that must be addressed by the development of smart communities. In these environments, there is a need not only for secure and applicable engineering solutions to protect privacy, but also for large-scale implementation of policies. This is to ensure that any sensitive information that needs to be handled is handled appropriately. This paper proposes an improved Cartographic Block-chain (CBC) block-chain technology based on Advanced Encryption Standard (AES) that contributes to the management of personal data collection and information access in smart buildings. The technology shared keys will be assigned to communication devices connected to smart access control, enhancing the control of sensitive private data in smart communities. Blockchain's technology can provide stronger security services for IOT applications.