Seyedeh Foruzan Shetab Bushehri - MA.Student in Department of Computer Engineering, Arvandan Non-profit Higher Education Institute, Khoramshahr ,Iran
Mohsen Kajbaf - Faculty member in Department of Computer Engineering, Abadan Branch,Islamic Azad University, Abadan,Iran
Khaled Mohammadnejad - Faculty member in Department of Computer Engineering, Arvandan Non -Profit Higher Education Institute , Khoramshahr,Iran

One of the latest changes in the way the Internet functions has been conducted with the introduction of cloud computing. Due to the fact that sensitive data is outsourced in cloud computing, there are security and privacy concerns in it. From a consumer perspective, there are concerns about cloud infrastructure security that have not been resolved, especially issues related to data privacy still remain. The main purpose of this study is a comprehensive review of the research activities in the field of cloud computing security. For this purpose, various types of proposed models were examined and their strengths and weaknesses were extracted and then a proper security strategy based on symmetric algorithms was presented. In the proposed solution, the original text to increase the performance and speed is initially encrypted using the symmetric key algorithm, Advanced Encryption Standard (AES), which has less computational time, and then encrypt it using the RSA asymmetric key algorithm. Using this technique, the time of data encryption will be reduced and security will be increased. Finally, the intended solution was implemented in the Eclipse software and compared with Blowfish and RSA algorithms. The results obtained from the evaluation clearly represent that the solution is optimal, so that the execution time has been reduced by approximately 2 times compared to the RSA algorithm and the rate of throughput efficiency has also significantly improved. Compared to Blowfish solution, the execution time has also decreased and the rate of throughput efficiency has had a considerable improvement.

Hybrid Encryption Algorithm, Security in Cloud Computing, Symmetric Algorithms