1 Digital Forensic: An Annalistic Challenge P E Ajmire 1 , Dr.Rajiv Dharaskar 2 , Dr. V M Thakare 3 1 Head, Dept. Of Comp.Sci G. S. Sci., Arts & Comm. College, Khamgaon peajmire@rediffmail.com 2 Director, MPGI Group of Institutes Integrated Campus Nanded. rvdharaskar@yahoo.com 3 Head,Dept. Of Comp.Sci. P.G.T.D, S.G.B.A.U. Amravati vilthakare@yahoo.co.in Abstract— The horizontal and vertical growth of the technology provides easy and low cost availability of computers within the society. The easy access of internet coupled with their ease of use and the unregulated Internet, which provides any number of hacking and attack tools for free download, has introduced society new challenges and threats at the same time. In this scenario, everyone is looking towards Digital Forensic or Computer Forensic. The Digital Forensic or Computer forensics is the application of science and engineering to the legal problem of digital evidence. It is a synthesis of science and law. In this paper we would like to provide the some evidences and methods of Digital forensics. Keywords— Digital Forensic, Digital Evidence, Disk Forensic, Internet Forensic. Digital Document. Introduction Our nation’s commercial, economic, and financial systems are now totally dependent on the rapid exchange of information, which requires a safe and secure exchange of data through our country’s vast computer networks. In fact, it is our nation’s entire infrastructure of our power grid, financial system, defence system, transportation systems, hospital and health systems, distribution systems, and governmental agencies that are operated by our computers and require that they continue to operate with both assurance and authenticity. Our reliance on this infrastructure will make our nation economically strong and most dependable in the entire world. These computer based infrastructure systems are vulnerable to human error, natural disaster, and exploitative attacks.The rapid pace of scientific and technological advancement has provided additional benefits to society; nevertheless, we must also be aware of the unintended and latent dysfunctional consequences that occasionally accompany such rapid growth and change. How we mitigate and manage these risks will in some cases be effective and, in other situations, require risk avoidance strategies. Today, personal computing is so ubiquitous within our society, we face not only the challenges of correctly using this computational power, but we must now guard our nation, our citizens, and our children from those who would use this computing power to exploit others. This computing power and modern devices creates new digital environment that science has bestowed on us, but along with this it give rise to a new paradigm in crime that has challenged and continues to challenge our law enforcement, prosecutors, and judiciary system to come to terms with successfully responding to the new ways in which criminal acts are perpetrated. Computer forensics is considered by some to be more of a task than a profession. Most practitioners of computer forensics were people from varied backgrounds attempting to collect digital artefacts in support of a criminal or civil legal matter. Today computer forensics can be considered an emerging, but true profession, or more accurately, a meta profession comprising the skill sets of several professions and subspecialties, such as law enforcement, information technology, and the legal services field.[1] Due to this the field of digital forensic has gain the attentions of all nation to improve and protect their security system. In India, in last decade the cybercrime rate has raised exponentially. The IGP (Western Range) Pratap Reddy said that “Cybercrime biggest challenge to cops, nation”. In the past 12 months, 56% of adults online in India have experienced cybercrime. More than 42 million people in India (more than 115,000 victims of cybercrimes every day) felt victim to cybercrime in the past 12 months, suffering approximately $8 billion (Rs 44,400