Detecting JFIF Header Using FORHEADER
Header and footer are important in digital investigation for JPEG file detection as only 16% of files are fragmented. The use of efficient algorithm to detect them is vital to reduce time taken for analyzing ever increasing data in hard drive or physical memory. Even though there are few applications developed for file carving that rely on header and footer, e.g., Foremost, Scalpel; however the algorithm used for header detection is not much discussed. In this paper, the authors introduce three novel algorithms; single-byte-marker, dual-byte-marker and 20-point-reference for JPEG File Interchange Format (JFIF) header detection using a newly introduced FORHEADER model.