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All Journal Bulletin of Electrical Engineering and Informatics Indonesian Journal of Electrical Engineering and Computer Science
Jerico S. Baladhay
Tarlac State University
Electrical & Electronics Engineering

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AES-128 reduced-round permutation by replacing the MixColumns function Jerico S. Baladhay; Edjie M. De Los Reyes
Indonesian Journal of Electrical Engineering and Computer Science Vol 33, No 3: March 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v33.i3.pp1641-1652

Abstract

Ensuring the protection of digital data is of utmost importance in our current reliance on network operations. However, security measures such as data encryption often result in decreased performance speed. This paper enhanced the 128-bit version of the advanced encryption standard (AES) by substituting the MixColumns function with a permutation-based approach and decreasing the overall number of rounds. The evaluation results indicate a substantial enhancement in the speed of encryption and decryption, with a 76.76% improvement in encryption time and a 55.46% improvement in decryption time. Furthermore, it is important to mention that the modifications implemented in the standard AES did not compromise its security in relation to the strict avalanche criterion. The avalanche effect of the modified AES is 52.92%, surpassing the minimum requirement of 50%. Finally, the modified AES demonstrated a 31.12% increase in throughput for encryption and a 25.50% increase for decryption when compared to the original AES, using the sample dataset.
Large file encryption in a reduced-round permutation-based AES file management system Jerico S. Baladhay; Heidilyn V. Gamido; Edjie M. De Los Reyes
Indonesian Journal of Electrical Engineering and Computer Science Vol 34, No 3: June 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v34.i3.pp2021-2031

Abstract

In the rapid evolving digital landscape, the imperative to ensure data security has never been more crucial. This paper addresses the pressing challenges in data security by introducing a file encryption management system, leveraging a modified advanced encryption standard (AES) algorithm with reduced round iterations and bit permutation. This system aims to comprehensively secure various file types, providing a dependable solution for file exchange. Our findings reveal substantial improvements in both encryption and decryption processes using the reduced-round permutation-based AES (RRPBA). The adapted algorithm demonstrates a significant 38.8% acceleration in encryption time and a remarkable 44.86% improvement in decryption time, positioning it as a pivotal component for efficient file operations within the management system. Moreover, the throughput assessments showcase a remarkable 33.73% improvement in encryption and 23.72% in decryption, outperforming the original AES, emphasizing the algorithm's superior computational effectiveness, signaling positive implications for future high-performance applications. In conclusion, the study not only addresses critical security challenges but also presents a viable solution with tangible speed advantages for file encryption and decryption processes within digital file management systems.
Dynamic adaptive session-based advanced encryption standard Jerico S. Baladhay; Marlon V. Gamido
Bulletin of Electrical Engineering and Informatics Vol 15, No 5: October 2026
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v15i5.12384

Abstract

Dynamic adaptive session-based advanced encryption standard (DASE) is an adaptive modification of the advanced encryption standard (AES) that allows the number of rounds to be adjusted to the security needs and timing constraints of each session. Conventional AES deployments run a fixed number of rounds regardless of data sensitivity, imposing needless processing on low-risk information and reducing flexibility in how security is applied. DASE defines three configurations: DASE-6, DASE-8, and DASE-10, and replaces the computationally heavy MixColumns transformation with a lightweight bit-permutation layer that preserves strong diffusion. Cryptographic robustness was evaluated using the avalanche effect and the strict avalanche criterion (SAC) across diverse plaintext patterns, while performance was measured on heterogeneous file types and sizes. DASE reached an average SAC of up to 53%, matching or exceeding standard AES-10, while DASE-6 delivered average encryption and decryption speed-ups of 50.55% and 38.94% over AES-10. DASE-8 and DASE-10 remained 40.46% and 32.54% faster in encryption, respectively, with DASE-10 retaining a clear advantage despite using the same round count as AES. The results demonstrate a tunable spectrum of security-performance trade-offs suitable for resource-constrained, high-throughput, and real-time data-protection scenarios.
Co-Authors Edjie M. De Los Reyes Heidilyn V. Gamido Marlon V. Gamido