R. Anderson, R. Needham, and A. Shamir, The steganographic file system, Proceedings of the Second International Workshop on Information Hiding, pp.73-82, 1998.

I. Baggili, A. Baabdallah, D. Al-safi, and A. Marrington, Research trends in digital forensic science: An empirical analysis of published research, Proceedings of the Fourth International Conference on Digital Forensics and Cyber Crime, pp.144-157, 2012.

H. Berghel, D. Hoelzer, and M. Sthultz, Data hiding tactics for Windows and Unix file systems, Advances in Computers, vol.74, pp.1-17, 2008.

K. Conlan, I. Baggili, and F. Breitinger, Anti-forensics: Furthering digital forensic science through a new extended granular taxonomy, Digital Investigation, vol.18, pp.66-75, 2016.

K. Eckstein and M. Jahnke, Data hiding in journaling file systems, Proceedings of the Fifth Digital Forensic Research Workshop, 2005.

K. Fairbanks, An analysis of Ext4 for digital forensics, Digital Investigation, vol.9, pp.118-130, 2012.

S. Garfinkel, Anti-forensics: Techniques, detection and countermeasures, Proceedings of the Second International Conference on Information Warfare and Security, pp.77-84, 2007.

R. Harris, Arriving at an anti-forensics consensus: Examining how to define and control the anti-forensics problem, Digital Investigation, vol.3, pp.44-49, 2006.

V. Holen, Reserved ext2/ext3/ext4 inodes, p.2012

A. Mathur, M. Cao, S. Bhattacharya, A. Dilger, A. Tomas et al., The new Ext4 filesystem: Current status and future plans, Proceedings of the Linux Symposium, vol.2, pp.21-33, 2007.

A. Mcdonald and M. Kuhn, StegFS: A steganographic file system for Linux, Proceedings of the Third International Workshop on Information Hiding, pp.463-477, 1999.

S. Piper, M. Davis, G. Manes, and S. Shenoi, Detecting hidden data in Ext2/Ext3 file systems, Advances in Digital Forensics, pp.245-256, 2005.

M. Rogers, Anti-forensics, presented at Lockheed Martin, 2005.

T. Grugq, The art of defiling: Defeating forensic analysis, presented at Black Hat USA, 2005.

C. Thuen, Understanding Counter-Forensics to Ensure a Successful Investigation, 2007.

T. Ts'o, Android will be using ext4 starting with Gingerbread, Blog Entry, 2010.

T. Ts'o, Ext4 filesystem tree, Kernel.org git repositories, 2018.

D. Wong and E. Howto, Ext4 Wiki (ext4.wiki.kernel.org/index. php/Ext4_Howto), 2015.

D. Wong, Ext4 Disk Layout, Ext4 Wiki (ext4.wiki.kernel.org/ index.php/Ext4_Disk_Layout), 2016.