On normalized compression distance and large malware |
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Authors: | Rebecca Schuller Borbely |
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Affiliation: | 1.CyberPoint International,Baltimore,USA |
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Abstract: | Normalized Compression Distance (NCD) is a popular tool that uses compression algorithms to cluster and classify data in a wide range of applications. Existing discussions of NCD’s theoretical merit rely on certain theoretical properties of compression algorithms. However, we demonstrate that many popular compression algorithms do not seem to satisfy these theoretical properties. We explore the relationship between some of these properties and file size, demonstrate that this theoretical problem is actually a practical problem for classifying malware with large file sizes, and propose some variants of NCD that mitigate this problem. |
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