Popularity of internet is not only change our life view, but change the view of crime in our society or all over the world. Increasing the number of computer crime day by day is the reason for forensic investigation. Digital forensic is used to bring justice against that person who is responsible for computer crimes or digital crimes. In this paper, we explain both type of forensic tool commercial as well as open source and comparisons between them. We also classify digital forensic and digital crimes according to their working investigation.
In this paper, we proposed a model for investigation process to any type of digital crime. This model is simple and gives efficient result to any type of digital crimes and better way to improve the time for investigation.