An Efficient Image Encryption Method Based on Improved Cipher Block Chaining in Cloud Computing as a Security Service

Abstract

Background: Cloud computing offers numerous services to users on demand, and gains it significance in current era. Securing the information stored in the cloud data center is one of the prominent issues. Sensitive information such as medical images attains much concentration regarding its security, when it is uploaded to data centers for outsourcing. Cryptographic algorithms are generally used for the encryption process, in which block cipher algorithms are frequently applied for image encryption methods. Objective: In this paper, an innovative Security-as-a-Service application for image encryption is proposed that paves high security for images during transmission through cloud networks. The proposed method uses the improved cipher block chaining encryption mode that enhances the algorithm to encrypt the RGB images of various volumes. Key generation is crafted as complex with mathematical model that overcomes the predicament key problem exists in earlier methods, which also upgrades quality of encryption. Results: Experimental results with standard test images and their analysis proves the robustness of this method. Performance of the proposed method is analyzed with some security analysis like entropy measure, statistical measure and compared with existing methods. Conclusion: The results reveal, that the proposed method serves not only better for RGB image encryption and also resists to various cryptanalytic attacks.