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The evolution of file carving

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2 Author(s)
Anandabrata Pal ; Polytechnic University, New York ; Nasir Memon

Presents the evolution of file carving and describes in detail the techniques that are now being used to recover files without using any file system meta-data information. We show the benefits and problems that exist with current techniques. In the future, solid-state devices (SSDs) will become much more prevalent. SSDs will incorporate wear-leveling, which results in files being moved around so as to not allow some clusters to be written to more than others. This is done because after a certain amount of writes a cluster will fail and, therefore, the SSD controller will attempt to spread the write load across all clusters in the disk. As a result, SSDs will be naturally fragmented, and should the disk controller fail the clusters on the disk will require file carving techniques to recover. There is a lot of research yet to be done in this area for data recovery. Finally, while Pal et. al's techniques are useful for recovering text and images, new weighting techniques need to be created for video, audio, executable and other file formats, thus allowing the recovery to extend to those formats.

Published in:

IEEE Signal Processing Magazine  (Volume:26 ,  Issue: 2 )