A Multi-Layered Hybrid Security Algorithm Based on Integrity for the Cloud Computing Environment

Cloud computing has emerged as significant and paradigm shift in outsourcing storage and computations. Data stored in public cloud without encryption is not safe due to many reasons such as insider attacks, flawed hardware, security vulnerabilities and service provider stealing or deleting data for monetary gains. Therefore, it is essential for data owner to outsource data to cloud after encryption. However, the existing encryption schemes such as RSA, DES and AES, though they provide strong security, may become victims to post-quantum securityscenarios. In this paper, a hybrid security algorithm is proposed for stronger encryption and decryption procedures. The algorithm is named Multi-Layer Hybrid Security Algorithm (ML-HSA) which has multiple data transformations using AES for encryption of given data, Information Dispersal Algorithm (IDA) for ensuring data integrity and hashing for data integrity verification. The proposed scheme is evaluated using Amazon EC2 (Elastic Compute Cloud) cloud platform and Amazon S3 (Simple Storage Service). The performance of ML-HSA is compared against state of the art security schemes such as RSA, DES andAES. Experimental results revealed that the proposed post-quantum security scheme provides stronger security with relatively less overhead due to multiple transformations involved.