IoT Devices, User Authentication, and Data Management in a Secure, Validated Manner through the Blockchain System[J] WIRELESS COMMUNICATIONS & MOBILE COMPUTING 2022(2022) Ahsan, Talha Khan, Farrukh Zeeshan Iqbal, Zeshan Ahmed, Muneer Alroobaea, Roobaea Baqasah, Abdullah M. Ali, Ihsan Raza, Muhammad Ahsan