A Hybrid Cryptographic Framework for Securing Cloud Storage Services Using AES and RSA

International Journal of Computer Science and Technology | Vol. 12, No. 8, August 2010 | pp. 55–61
DOI: 10.46882/2010/IJCST/000102

Research Article

Title: A Hybrid Cryptographic Framework for Securing Cloud Storage Services Using AES and RSA

Names of Authors: Robert K. Johnson¹, Elena R. Petrova²

Authors’ Affiliations: ¹School of Computing, Cyber Security Center, Boston, USA; ²Faculty of Informatics, Technical University, Sofia, Bulgaria

Abstract: Cloud storage adoption is heavily restricted by data privacy and security vulnerabilities during multi-tenant data access. Single encryption models either suffer from heavy computational bottlenecks or lack robust key management schemes. This paper presents a hybrid cryptographic framework designed to maximize data confidentiality in distributed cloud environments. Data streams are symmetrically encrypted using the Advanced Encryption Standard (AES) with a 256-bit key length to ensure high throughput. Concurrently, the AES secret keys are asynchronously protected using Rivest-Shamir-Adleman (RSA) 2048-bit encryption during distribution phases. The proposed framework implements a zero-knowledge proof scheme ensuring that the cloud service provider retains no visibility into the plaintext files or encryption keys. Experimental evaluations showed an encryption throughput of 45 MB/s for large-scale datasets, outperforming stand-alone asymmetric models by a factor of 10. The processing overhead remained below 8% across standard virtualized cloud instances. Security analysis under simulated brute-force and side-channel threats verified that the hybrid approach provides exponential computational resistance against key leakage. This model addresses enterprise privacy compliance needs without sacrificing file transfer performance.

Keywords: Cloud Security, Advanced Encryption Standard, RSA Encryption, Hybrid Cryptography, Data Confidentiality

Manuscript Timeline: Received April 18, 2010; Revised June 11, 2010; Accepted July 08, 2010; Published August 18, 2010.

Citation: Johnson, R. K., & Petrova, E. R. (2010). A Hybrid Cryptographic Framework for Securing Cloud Storage Services Using AES and RSA. International Journal of Computer Science and Technology, 12(8), 55–61.

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