Big Data can reduce the processing time of large volumes of data in the distributed computing environment using Hadoop. It also can predict potential cybersecurity breaches, help stop cyber attacks, and facilitate post-breach digital forensic analysis. This paper introduces Big Data applications in distributed analytics, general cybersecurity (general cyber threats, cyber attacks, and cyber security in cloud computing, etc.), cyber warfare, cyber defense, and digital forensics. Some methods and technology progress in these cyberareas are presented. Some challenges of Big Data applications in the areas and solutions to part of the challenges are also discussed.
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