File Format Identification
File Format Identification is the process of figuring out the format of a sequence of bytes. Operating systems typically do this by file extension or by embedded MIME information. Forensic applications need to identify file types by content.
- Written in C.
- Rules in /usr/share/file/magic and compiled at runtime.
- Powers the Unix “file” command, but you can also call the library directly from a C program.
- Writen in Java
- Developed by National Archives of the United Kingdom.
- XML config file
- Closed source; free for non-commercial use
- Proprietary but free demo.
Current research papers on the file format identification problem. Most of these papers concern themselves with identifying file format of a few file sectors, rather than an entire file.
- Mason McDaniel, Automatic File Type Detection Algorithm, Masters Thesis, James Madison University,2001
- Content Based File Type Detection Algorithms, hicss,pp.332a, 36th Annual Hawaii International Conference on System Sciences (HICSS'03) - Track 9, 2003.
- Fileprints: identifying file types by n-gram analysis, LiWei-Jen, Wang Ke, Stolfo SJ, Herzog B.., IProceeding of the 2005 IEEE workshop on information assurance; 2005 [slides]
- File type identification of data fragments by their binary structure. , Karresand Martin, Shahmehri Nahid. Proceedings of the IEEE workshop on information assurance; 2006b. p. 140–7. [slides]