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"..Computer forensics is a branch of forensic science pertaining to legal evidence found in computers and digital storage mediums. Computer forensics is also known as digital forensics. The goal of computer forensics is to explain the current state of a digital artifact. The term digital artifact can include a computer system, a storage media (such as a hard disk or CD-ROM), an electronic document (e.g. an email message or JPEG image) or even a sequence of packets moving over a computer network. The explanation can be as straightforward as "what information is here?" and as detailed as "what is the sequence of events responsible for the present situation?" The field of Computer Forensics also has sub branches within it such as Firewall Forensics, Database Forensics and Mobile Device Forensics. There are many reasons to employ the techniques of computer forensics:
Special measures should be taken when conducting a forensic investigation if it is desired for the results to be used in a court of law. One of the most important measures is to assure that the evidence has been accurately collected and that there is a clear chain of custody from the scene of the crime to the investigator---and ultimately to the court." http:// en. wikipedia. org / wiki / Computer_forensics#Collecting_Digital_Evidence "..Disk cleaning utilities use a variety of methods to overwrite the existing data on disks. The effectiveness of disk cleaning utilities as anti-forensic tools is often challenged as some believe they are not completely effective. Experts who don't believe that disk cleaning utilities are acceptable for disk sanitization base their opinions off current DOD policy, which states that the only acceptable form of sanitization is degaussing. Disk cleaning utilities are also criticized because they leave signatures that the file system was wiped, which in some cases is unacceptable. 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. Some of the widely used file wiping utilities include R-Wipe & Clean, Eraser, Aevita Wipe & Delete and CyberScrubs PrivacySuite." http:// en. wikipedia. org / wiki / Anti-computer_forensics |
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