Advanced Encryption Techniques for Enhancing Data Security and Privacy in Cloud Environments
Parth D. Shah, Samarth Shah, Anurag A. Agrawal · 2025
This paper presents a novel hybridised encryption framework, BH-WABE, for securing cloud data, which combines symmetric encryption (Blowfish) and attribute-based encryption (ABE) to ensure fine-grained access control. The proposed scheme utilises a weight attribute-based authority (WAA) to dynamically assign attribute weights, enforcing hierarchical access policies and ensuring multi-authority security and resistance to collusion. Performance evaluations show that the encryption time increases from 118 ms to 341 ms, and the decryption time rises from 113 ms to 598 ms as the file size grows from 1 MB to 3 MB, with throughput remaining stable at approximately 0.00847 to 0.00874. Comparative analysis with the base E-ART algorithm reveals that BH-WABE outperforms E-ART in both encryption and decryption times. For instance, BH-WABE achieves encryption times of $\mathbf{1 1 8 ~ s, 2 3 0}$ s, and 341 s for file sizes of $1 \mathrm{MB}, 2 \mathrm{MB}$, and 3 MB, respectively, while E-ART lags behind with higher encryption times.