An exabyte (EB) is a unit of digital information storage used to denote the size of data. It is equivalent to 1 billion gigabytes (GB), 1,000 petabytes (PB) or 1,000,000,000,000,000,000 bytes (B).
Digital forensics is the process of uncovering and interpreting electronic data for use in a court of law. The goal of the process is to preserve any evidence in its most original form while performing a structured investigation by collecting, identifying and validating the digital information for the purpose of reconstructing past events.
The evidentiary nature of digital forensic science requires rigorous standards to stand up to cross examination in court. As a result, there have been efforts by organizations like the National Institute of Standards and Technology, which published the "Guide to Integrating Forensic Techniques into Incident Responses".Despite this, there are several challenges facing digital forensic investigators:
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