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All Journal Journal of Computing Theories and Applications
Paul Avwerosuoghene Onoma
Federal University of Petroleum Resources
Computer Science & IT Decision Sciences, Operations Research & Management

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Investigating a SMOTE-Tomek Boosted Stacked Learning Scheme for Phishing Website Detection: A Pilot Study Eferhire Valentine Ugbotu; Frances Uchechukwu Emordi; Emeke Ugboh; Kizito Eluemunor Anazia; Christopher Chukwufunaya Odiakaose; Paul Avwerosuoghene Onoma; Rebecca Okeoghene Idama; Arnold Adimabua Ojugo; Victor Ochuko Geteloma; Amanda Enaodona Oweimieotu; Tabitha Chukwudi Aghaunor; Amaka Patience Binitie; Anne Odoh; Chris Chukwudi Onochie; Peace Oguguo Ezzeh; Andrew Okonji Eboka; Joy Agboi; Patrick Ogholuwarami Ejeh
Journal of Computing Theories and Applications Vol. 3 No. 2 (2025): JCTA 3(2) 2025
Publisher : Universitas Dian Nuswantoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62411/jcta.14472

Abstract

The daily exchange of informatics over the Internet has both eased the widespread proliferation of resources to ease accessibility, availability and interoperability of accompanying devices. In addition, the recent widespread proliferation of smartphones alongside other computing devices has continued to advance features such as miniaturization, portability, data access ease, mobility, and other merits. It has also birthed adversarial attacks targeted at network infrastructures and aimed at exploiting interconnected cum shared resources. These exploits seek to compromise an unsuspecting user device cum unit. Increased susceptibility and success rate of these attacks have been traced to user's personality traits and behaviours, which renders them repeatedly vulnerable to such exploits especially those rippled across spoofed websites as malicious contents. Our study posits a stacked, transfer learning approach that seeks to classify malicious contents as explored by adversaries over a spoofed, phishing websites. Our stacked approach explores 3-base classifiers namely Cultural Genetic Algorithm, Random Forest, and Korhonen Modular Neural Network – whose output is utilized as input for XGBoost meta-learner. A major challenge with learning scheme(s) is the flexibility with the selection of appropriate features for estimation, and the imbalanced nature of the explored dataset for which the target class often lags behind. Our study resolved dataset imbalance challenge using the SMOTE-Tomek mode; while, the selected predictors was resolved using the relief rank feature selection. Results shows that our hybrid yields F1 0.995, Accuracy 0.997, Recall 0.998, Precision 1.000, AUC-ROC 0.997, and Specificity 1.000 – to accurately classify all 2,764 cases of its held-out test dataset. Results affirm that it outperformed bench-mark ensembles. Result shows the proposed model explored UCI Phishing Website dataset, and effectively classified phishing (cues and lures) contents on websites.
Investigating Security Enhancement in Hybrid Clouds via a Blockchain-Fused Privacy Preservation Strategy: Pilot Study Tabitha Chukwudi Aghaunor; Eferhire Valentine Ugbotu; Emeke Ugboh; Paul Avwerosuoghene Onoma; Frances Uchechukwu Emordi; Arnold Adimabua Ojugo; Victor Ochuko Geteloma; Rebecca Okeoghene Idama; Peace Oguguo Ezzeh
Journal of Computing Theories and Applications Vol. 3 No. 4 (2026): JCTA 3(4) 2026
Publisher : Universitas Dian Nuswantoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62411/jcta.15508

Abstract

The proliferation of cloud infrastructures has intensified concerns regarding data security, integrity, identity and access management, and user privacy. Despite recent advances, existing solutions often lack comprehensive integration of privacy-preserving mechanisms, dynamic trust management, and cross-provider interoperability. This study proposes an AI-enabled, zero-trust, blockchain-fused identity management framework for secure, privacy-preserving multi-cloud environments. The framework integrates homomorphic encryption with differential privacy for aggregate-level protection and secure multi-party computation for collaborative data processing. The proposed system was validated in a simulated multi-cloud environment using CloudSim, Ethereum blockchain, and AWS EC2. Experimental results indicate homomorphic encryption latency of approximately 450ms per operation and statistically significant security improvements (t(128) = 12.47, p < 0.001), privacy (t(95) = 8.93, p < 0.001), and throughput (t(156) = 15.21, p < 0.001). The framework achieved differential privacy with ε = 0.1 while retaining 99.2% data utility, and demonstrated a 34% improvement in processing speed over conventional differential privacy approaches. In addition, the implementation was observed to be 2.3× faster than BGV-based configurations, with 45% lower memory consumption than CKKS and a 67% reduction in ciphertext size relative to baseline implementations. From an operational perspective, the framework shows a 23% reduction in security management costs, a 31% improvement in resource utilization efficiency, and an 18% decrease in compliance audit expenses. The model further indicates a 27% reduction in total cost of ownership (TCO) compared with multi-vendor security solutions, a projected return on investment (ROI) within 14 months, and an 89% reduction in security incident response costs under the evaluated conditions.
Co-Authors Amaka Patience Binitie Amanda Enaodona Oweimieotu Andrew Okonji Eboka Anne Odoh Arnold Adimabua Ojugo Chris Chukwudi Onochie Christopher Chukwufunaya Odiakaose Eferhire Valentine Ugbotu Emeke Ugboh Emeke Ugboh Frances Uchechukwu Emordi Joy Agboi Kizito Eluemunor Anazia Patrick Ogholuwarami Ejeh Peace Oguguo Ezzeh Peace Oguguo Ezzeh Rebecca Okeoghene Idama Tabitha Chukwudi Aghaunor Victor Ochuko Geteloma