Finding Electronic Evidence With Data Forensics
With the ever increasing importance of computers and digital media for both personal and corporate users, the number of crimes involving electronic data is now higher than ever. Thus, only data forensics experts can search computers for electronic evidence, make digital investigations, recover lost data and provide technical expertise. To count only a few of the judicial cases for which data forensics is useful, we ought to mention sexual harassment, intellectual property theft, discrimination, breach of contract and so on. Therefore, it is not that difficult to understand why data forensics is so important in the legal system.
The exact specificity of data forensics is the extraction of pieces of information that would remain undetected at a normal investigation. Data forensics will normally examine files that are hidden, deleted or even discarded, as well as fragments or file left-overs. Although there are lots of challenges when trying to recover data or to identify the criminal process, experts in this fields have more than once been successful at finding the needle in the haystack. What is the relevance of such evidence for legal cases? Well, practice has already proved it that even the course of a trial could be changed by the retrieval of deleted e-mail messages for instance.
Data forensics constantly needs to face apparently unsurmountable challenges. The applications do have far-reaching applications, but the work to extract digital evidence is strict and exhausting. Sometimes the necessary information is buried deep in the corporate electronic system, or sometimes, even if it is physically identifiable it is difficult to separate and analyze extensively, off line. This is also the reason why a duplication procedure is used to protect the information during the extraction process. Great caution, strict standards and lots of skills are needed for each of these steps and only real pros can succeed.
When a criminal act involving digital systems is detected, the best way of action is not to address the other party and ask for a preservation of computer records, but rather a surgical approach by an expert in data forensics. This will enable the appropriate and cost-limited data collection in the best conditions possible. Moreover, it is false to assume that data forensics only applies to computer hard drives as the main systems that can store information; there are cases of criminal action involving, USB devices, CDs, DVDs and even voice mail systems. Even photocopy machines include hard drives and the scanned or copied documents can be afterwards retrieved from them.
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