Images are very vulnerable to modifications. Modifications in the images are carried out by attackers to change or conceal its meaning by using sophisticated image editing software. These software applications are easily available today; not only on personal computers and laptops but on handheld mobile devices as well.
This is a cause of great concern and poses threats to the public, government, and businesses. Hence, these images need to be authenticated. Authenticating the digital image for itscontent, i.e., integrity and the source is the field of Digital Image Forensics (DIF). DIF has gained tremendous importance in last one decade among the research community. The fundamental problems digital image forensics techniques attempt to solve is the identification of the source and detecting the integrity of digital images.Identification of source involves determining the means by which the images are created like camera, scanner, and regenerative algorithm. Similarly, integrity can be confirmed by analyzing the images for its modification.