Forensics is an ever evolving science with a lot of possibilities acquire deeper knowledge about by different forensics programs or forensics classes.
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 breach of contract, intellectual property theft, discrimination, sexual harassment and so on. Therefore, it was not difficult for data forensics to become a legal necessity in the context of the computers’ ubiquity.

A normal type of computer investigation cannot detect or extract bits of information remained after deletion. File left-overs, deleted files, hidden and discarded files are searched and analyzed as part of the data forensics analysis. 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 relevance does such evidence have for legal cases? Well, it has been proved by practice that the recovery of a deleted e-mail message can change the course of a trial.

Data forensics constantly needs to face apparently unsurmountable challenges. The applications are indeed far-reaching, but it takes hours to extract digital evidence and make it stable. Sometimes the extractor has difficulties in getting to the information that is buried too deep in the electronic system, or too exposed to destruction. Moreover, for a successful data collection, data forensics has to protect the extracted elements by duplication so that  the information is preserved and not altered and spoiled during the process. Great caution, strict standards and lots of skills are required for each of these steps and only real pros can succeed.

A data forensics expert should be contacted immediately, once a breach in the security system or a criminal act against electronic media is detected. 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.