Validating a forensic tool
The process of utilizing automated tools has served law the courts and enforcement very good, and experienced investigators and detectives have succeeded in using their finely honed policing skills, along with the automated software to deliver sound evidence. But, the advancements in the field of computer forensics has generated a demand for new computer tools (or augmented functionality to current tool) and ways to validate that these tools are actually ‘‘forensic’’ i.e. able to meeting the ‘trier of fact’ requirements. The digital forensics science is based on the repeatable process principles and quality evidence.
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Consistent with the NIST (National Institute of Standards and Technology), test outcomes must be reproducible and repeatable to be considered acceptable as electronic evidence. Repeatability refers to gaining the same outcomes when using a similar technique on identical test substances in the same lab by the same technician using the same apparatus within short time intervals. On the other hand, reproducibility refers to acquiring the same outcomes being obtained when employing the same technique on identical test substances in different labs with different operators employing different equipment.
(U.S. Department of Justice, 2013).
Doherty, E. P. (2013). Digital forensics for handheld devices. Boca Raton, FL: CRC Press.
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