Evaluating the Effectiveness of Security and Encryption Methods for Cloud Data Protection: Application to Data Digitization at Hai Phong University

Digital transformation and data digitization in higher-education institutions raise pressing requirements for protecting data hosted on cloud computing platforms. This paper reports preliminary findings from a university-level research project evaluating three representative encryption approaches — symmetric AES-256, asymmetric RSA-2048, and a hybrid AES+RSA scheme — for protecting digitized records (student, staff, and training documents) at Hai Phong University. Because the university's digitization system is still being deployed, the research team built a simulation model whose baseline performance parameters were calibrated against published benchmarks for AES-NI and RSA-OAEP implementations (see Section 3 and the References) to illustrate the proposed evaluation framework; all figures reported here are simulated data, not measurements from a production system. Simulation results show AES-256-GCM achieving an average throughput of 400–450 MB/s with near-linear scaling; direct RSA-2048 encryption of bulk data incurs rapidly growing processing time and is impractical at scale; the hybrid AES+RSA scheme retains throughput close to pure AES while inheriting RSA's key-management advantages, at a negligible additional storage cost (under 0.1%). Based on these findings, the team recommends adopting a hybrid AES-256/RSA-2048 (or ECC) scheme for the university's data digitization system and proposes empirical validation on live infrastructure as the next research phase