Browsing by Author "Orman, Zeynep"
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Item A modified firefly algorithm-based feature selection method and artificial immune system for intrusion detection(Bursa Uludağ Üniversitesi, 2020-03-27) Günay, Melike; Orman, ZeynepIntrusion detection systems generally produce high dimensional data in network-based computer systems. It is required to analyze this data effectively and create a successful model by selecting the important features to save only the meaningful data and protect the system against suspicious behaviors and attacks that can occur in a system. Firefly Algorithm (FFA) is one of the most promising meta-heuristic methods which can be used to select important features from big data. In this paper, a modified Firefly Algorithm-based feature selection method is proposed. The traditional Firefly Algorithm is improved by using the K-Nearest Neighborhood (K-NN) classifier and an additional feature selection step. The proposed method is tested on 4 different datasets of various types of attacks. Three different sub-feature sets are obtained for each dataset and the classification performances are compared. Artificial Immune System (AIS) method is also implemented to generate artificial data for the datasets that have an insufficient number of data. This study shows that the proposed Firefly Algorithm performs successfully to decrease the dimension of data by selecting the features according to the obtained accuracy rates of the K-NN method. Memory usage is dramatically decreased over 50% by reducing the dimension with the proposed FFA. The obtained results indicate that this method both saves time and memory usage.Item Rule generation based on modified cuttlefish algorithm for intrusion detection system(Bursa Uludağ Üniversitesi, 2021-01-25) Eesa, Adel Sabry; Sadiq, Sheren; Hassan, Masoud Muhammed; Orman, ZeynepNowadays, with the rapid prevalence of networked machines and Internet technologies, intrusion detection systems are increasingly in demand. Consequently, numerous illicit activities by external and internal attackers need to be detected. Thus, earlier detection of such activities is necessary for protecting data and information. In this paper, we investigated the use of the Cuttlefish optimization algorithm as a new rule generation method for the classification task to deal with the intrusion detection problem. The effectiveness of the proposed method was tested using KDD Cup 99 dataset based on different evaluation methods. The obtained results were also compared with the results obtained by some classical well-known algorithms namely Decision Tree (DT), Naïve Bayes (NB), Support Vector Machine (SVM), and K-Nearest Neighborhood (K-NN). Our experimental results showed that the proposed method demonstrates a good classification performance and provides significantly preferable results when compared with the performance of other traditional algorithms. The proposed method produced 93.9%, 92.2%, and 94.7% in terms of precision, recall, and area under curve, respectively.