So, although using a piece of software such as this one immediately after creating a file might give some level of reassurance, there is an element of snake oil associated with all programs which pretend to securely erase individual documents created by the user. Or to lose the password of an encrypted volume. The only way to be sure that sensitive information is erased is to erase the whole partition or disk, or to erase the free space on that partition or disk. There are many cases in which parts of the file, or copies of it, would still remain on the disk (and therefore be susceptible to forensic attack), because the erasing software does not know where they might be. It is also worth noting that no software can boast of securely erasing individual files or folders with absolute certainty. It also erases free space on a disk or partition, or the whole partition for that matter.There is no way in C-Cleaner, for instance, to select a Word document you have created, and erase it securely. It erases some pre-determined files and folders created by Windows, and specific application software, which may contain identifying personal information while not being necessary for computer operation. Save | CancelĬ-Cleaner does not erase individual files or folders, and that's one of its main drawbacks, as it would be a natural thing for it to do. I suggest both you and Borg don't set yourself up as profesional data storage device sanitisers as your methods leave data retrievable using very basic forensic methods. Then use something like HxD to load the raw HD contents and look at the untouched clusters and there is the original data. Try using a real defragmenter and not the GUI-less microsoft one so you can see where a files data is scattered around a drive then delete/defrag and copy your VOB files and notice that nothing written to the clusters that had data in prior to the deletion and defragmentation. No need to shuffle files about with a defrag and part wipe part of the HD surface redundantly copying VOB files then deleting them leaving evidence of pirate movie trading activities on the HD. That is why a dedicated tool like Heidi.ie Eraser will do that and wipe cluster tips. you need to write many coppies of the VOB file to fill up all the unallocated space and even then some data could leak in cluster tip slack space. defragment the drive and any remaining fragmented files will be moved towards the front of the drive and when you copy over with a DVD VOB file it will normally use the first unallocated blocks and completely miss the defragmented data blocks previous locations and the deleted data remaining in the last 80% of the drive I know as I am aware what defragmentation does and what writing a small file like a 1GB DVD VOB file does. Maria, DVD files are not magic, again that only potentially erases part of the hard drive surface the rest remains if fragmented files parts were in the last 80% of the drive surface and delete them, the data remains in the last 80% of the drive.
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