Towards 5G, 6G and 7G Sustainable and Potential Applications Using Blockchain: Comparative Analysis and Prospective Challenges*

The Internet of Things (IoT) turns pervasive computing into a reality of connected everything. IoT connects billions of devices for rapid information sharing, specifically in 5G and 6G but it creates significant issues in privacy, transparency, and security. Blockchain has proved to be adaptive and useful for many applications, including those in the automobile sector. The aim of Industry 4.0 is to improve performance while sustaining quality under cost. The paper presents the existing survey of 5G, 6G, and 7G along with blockchain. The study proposes the architecture of 6G and an overview of the challenges and possible applications of blockchain using 5G, 6G, and 7G