مرکز منطقه ای اطلاع رسانی علوم و فناوری Journal of Information Systems and Telecommunication (JIST) 2322-1437 14 53 2026 5 30 KSDB: Improving cloud database security by using searchable encrypted data en Davud Mohammadpur University of Zanjan Mahmood Khoeini University of Zanjan 2025 7 19 Secure database Searchable encryption Cloud storage Secure SQL query http://jist.ir/ar/Article/Download/50894