Computer forensics (also known as computer forensic science or cyber forensics) is a branch of digital forensic science pertaining to evidence bounce in computers and digital storage media. The goal of computer forensics is to apply investigation and analysis techniques to examine digital media with the aim of identifying, preserving, recovering, analyzing, and presenting facts and opinions about the digital information.
Although it is most often associated with wide variety of computer comes, computer forensics may also be used in civil proceedings.
Evidence from computer forensics investigation is usually subjected to the same guidelines and practices of other digital evidence. It has been used in number of high-profile cases and is becoming widely accepted as reliable evidence in U.S. and European court system.
There is more information retained in computer than people realize and it's difficult to completely remove information. For these reasons―as well as many others―computer forensics can often find evidence of, and sometimes completely recover, lost or deleted information.