المجلة الدولية للعلوم والتقنية

Information Security has become an important issue in data storing and retrieving. Encryption has come up as a solution, and plays an important role in data security system. This security mechanism uses some algorithms to encrypt data into unreadable text which can be only being decrypted by party those possesses the associated key. Many techniques are needed to protect the sensitive "shared" data. Although the principle of all encryption algorithms is the same, different DBMS(Database Management System) vendors may implemented them in different ways which affected in someway the performance of these products. One of the most powerful commercial DBMS is SQL(Structured Query Language) and one of the most dominated open sources (MySQL) were chosen to conduct this study. Three encryption techniques like AES(Advanced Encryption Standard),DES(Data Encryption Standard) andMD5(Data Encryption Standard) algorithms were implemented and their performance was compared in terms of execution time. The results of the experiments showed that the performance of the implemented algorithms is varied based on the hosted DBMS.