SANS Digital Forensics and Incident Response Blog: Tag - EID

Digital Forensics: Too Much Porn, Too Little Time

I recently had a case where one of the requirements was to determine if the PC had been used to view and or download pornographic images from the Internet. First let me say that in my view the only party that can ultimately determine if an image is pornographic is the court. That being said we agreed in the onset of the investigation that any image that clearly showed sexual organs would be the definition we would use in determining if a particular image met the client's definition of a pornographic image.

Processing the case with FTK 3.12 and both collecting images in allocated space as well as carving for images in unallocated space revealed well over 60,000 images. The client needed and answer quickly hence manually reviewing and classifying the large number of images was not an option. If you simply did a quick view of each image for just 5 seconds you would burn about 2 weeks of labor. The process needed to be automated and sooner than later. I had heard AccessData had

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