Review Study on Blockchain Frameworks for Security Issues in IoT Devices

A coalition of IoT devices, such as the smart houses, smart health care system, the smart device and many more, can share resources through communication lines. The Internet is integrated with the physical world over existing network infrastructure, allowing intelligent devices to share data more efficiently. As IOT devices have specific characteristics such as having low processing power, limited memory and energy, securing access to them requires special requirements. Because of their complex management of access, and their incredulity due to centralized control, conventional access control systems do not offer the security of data that IoT systems need. Blockchain technology is expected to enhance the IoT technology by ensuring trust and reducing overall overhead. We can address IoT's architectural shortcomings by including transparency, data encryption, auditable data, operational resilience, and immutability. In this paper, the most relevant findings are presented in the area of understanding blockchain applications to solve authorization and access control issues in IoT environments. Additionally, future suggestions and ideas are discussed in an effort to improve authentication and access control solutions over time.