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In recent times, MapReduce has become a popular tool for handling big data. At the same time, uncertainty is related to arbitrariness, fuzziness, ambiguity, irregularity and incomplete knowledge. In RS theory, the uncertainty behaviour of the data in the dataset of interest is managed by using upper and lower approximate sets and classification accuracy. The RS model is integrated with data clustering technique for optimal outcomes. With this motivation, this study designs an Optimal Clustering with RS‐Based Rule Generation Model (OC‐RSRGM) for data classification on MapReduce environment. The OC‐RSRGM technique aims to generate an optimal set of rules using RST for the data classification process and it involves a two‐stage process namely Optimal Fuzzy c‐Means Clustering (OFCM) and RSRGM‐based rule generation with classification. The OFCM technique is derived to eradicate the local optimal problem of the FCM (Fuzzy c‐Means) model using Barnacles Mating Optimizer (BMO). It provides the decision‐makers with all the information needed to design appropriate mechanisms to support their decision‐making activities. The Hadoop MapReduce tool is used to handle big data. The proposed method combines an FCM, BMO, RS theory to accomplish effective decision‐making. The OC‐RSRGM technique can be employed to continuous value dataset where data point does not offer any class details and it might be uncertain. To validate the performance of OC‐RSRGM technique, a detailed experimental analysis is carried out to highlights the betterment of OC‐RSRGM technique. The proposed OC‐RSRGM technique has obtained an effective outcome with the CT of 5.43 s. [ABSTRACT FROM AUTHOR]

Machine learning (ML) is currently a crucial tool in the field of cyber security. Through the identification of patterns, the mapping of cybercrime in real time, and the execution of in-depth penetration tests, ML is able to counter cyber threats and strengthen security infrastructure. Security in any organization depends on monitoring and analyzing user actions and behaviors. Due to the fact that it frequently avoids security precautions and does not trigger any alerts or flags, it is much more challenging to detect than traditional malicious network activity. ML is an important and rapidly developing anomaly detection field in order to protect user security and privacy, a wide range of applications, including various social media platforms, have incorporated cutting-edge techniques to detect anomalies. A social network is a platform where various social groups can interact, express themselves, and share pertinent content. By spreading propaganda, unwelcome messages, false information, fake news, and rumours, as well as by posting harmful links, this social network also encourages deviant behavior. In this research, we introduce Deep Belief Network (DBN) with Triple DES, a hybrid approach to anomaly detection in unbalanced classification. The results show that the DBN-TDES model can typically detect anomalous user behaviors that other models in anomaly detection cannot. [ABSTRACT FROM AUTHOR]