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Testimonials
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"..Digital evidence can be collected from many sources. Obvious sources include computers, cell phones, digital cameras, hard drives, CD-ROM, USB memory devices, and so on. Non-obvious sources include settings of digital thermometers, black boxes inside automobiles, RFID tags, and web pages (which must be preserved as they are subject to change). Special care must be taken when handling computer evidence: most digital information is easily changed, and once changed it is usually impossible to detect that a change has taken place (or to revert the data back to its original state) unless other measures have been taken. For this reason it is common practice to calculate a cryptographic hash of an evidence file and to record that hash elsewhere, usually in an investigator's notebook, so that one can establish at a later point in time that the evidence has not been modified since the hash was calculated .. All digital evidence must be analyzed to determine the type of information that is stored upon it. For this purpose, specialty tools are used that can display information in a format useful to investigators. Such forensic tools include: AccessData's FTK, Guidance Software's EnCase, and Brian Carrier's Sleuth Kit. In many investigations, numerous other tools are used to analyze specific portions of information. Typical forensic analysis includes a manual review of material on the media, reviewing the Windows registry for suspect information, discovering and cracking passwords, keyword searches for topics related to the crime, and extracting e-mail and images for review.." http:// en. wikipedia. org/ wiki/ Computer_forensics "..File wiping utilities are used to delete individual files from an operating system. The advantage of file wiping utilities is that they can accomplish their task in a relatively short amount of time as opposed to disk cleaning utilities which take much longer. Another advantage of file wiping utilities is that they generally leave a much smaller signature than disk cleaning utilities. There are two primary disadvantages of file wiping utilities, first they require user involvement in the process and second some experts believe that file wiping programs don't always correctly and completely wipe file information." http:// en. wikipedia. org/ wiki/ Anti-computer_forensics |
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