المنشورات ورقة مؤتمر 2020 Security Challenges and Strategies for the IoT in Cloud Computing مزيد من المنشورات A Secure Energy Trading System for Electric Vehicles in Smart Communities using Blockchain Blockchain based Secure Energy Trading with Mutual Verifiable Fairness in a Smart Community GRA-PIN: A Graphical and PIN-Based Hybrid Authentication Approach for Smart Devices