![]() The second technique is the hash analysis. A file signature analysis will compare files, their extensions, and their headers to a known database of file signatures and extensions and report the results. The file extensions and headers should, in most cases, match, although there are a variety of exceptions and circumstances where there is a mismatch, no match, unknown information, or anomalous results. Often, files have filename extensions to identify them as well, particularly in a Windows operating system. Most files have a unique signature or header that can be used by the operating system or application program to identify a file. The first technique is the file signature analysis. ![]() You should, therefore, strive to master these techniques and their associated concepts. This chapter will cover two data analysis techniques that are core skill sets for competent examiners because they are used in most examinations. Conducting a hash analysis and evaluating the results. ![]()
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