Every now and again, two of my favourite subjects come together (No, not blackmail and hard discs) - Technology and Motorsports.
Formula 1 star of the McLaren-Mercedes team, Lewis Hamilton, has been the focus of a blackmail attempt by a man in Germany, named simply “Dieter.” Dieter somehow obtained a hard drive, that had supposedly been disposed of some months before, that contained documents and other personal information. For those who are unfamiliar with the McLaren-Mercedes scandal of last year, the team were found guilty of using secrets from another team to improve their own car - and this hard drive could possibly had more such evidence on it. Trying to sell the hard drive to the German motorsport magazine, “Bild”, Dieter was arrested by police after the magazine tipped off the authorities, as reported by the Daily Telegraph today.
So how do you properly and permanently remove sensitive information from your hard disc?
Remember - when you delete things in Windows the data is usually still there - just because you can’t access the information doesn’t mean somebody else won’t be able to. The very nature of deleting a file just means renaming the first character of the filename, to let the system know the space it takes up can be used for new files - and the data is still there until new files are written in the same place. And even if the space the file used to occupy is overwritten with different files, there are techniques that can be employed to find out what used to be on the surface of the disc. Once you know this, you need something a little better than the recycle bin in windows to remove your sensitive data, and there are three methods you can use to do it:
The first way is with a program that allows you to securely delete files - rather than by using the recycle bin in Windows, download Eraser. It has a drag and drop interface that allows you to do a multiple-pass wipe so that the bytes the file occupies get overwritten properly, making it practically impossible to retrieve the data that used to be your file. Amongst others, by default, it uses the “Gutmann” method of wiping that employees 35 separate passes of specially selected data to make sure nobody can retrieve the information, chemically, from the drive. This should be enough if you just need to remove the odd file that’s a bit sensitive. It is geared towards doing things in batches, so you could drag files you want to remove into the program and before you log out, process them all in one go. This takes care of single file deletes.
The second way is a little more abstract, and Eraser is up to the task of removing this type of data too. Remember when your files are removed, they aren’t actually erased, the space is allocated back to the system to write files into? Baring this in mind, all the files you’ve deleted previously, will have data scattered all over the drive, in places ready to be overwritten, but for whatever reason the system hasn’t got around to using yet. So the second method is to wipe your free space on the drive. Every byte that isn’t allocated to a file will be subjected to the same rigorous treatment, using the same methods.
When you’ve come to the point when you’re ready to throw the hard drive away and want to be sure there’s nothing left on it, the last method to remove data is to wipe the whole drive. And the best way to do this is to melt it down! Failing that, if you don’t have a kiln in your house, try DBAN (Darik’s Boot And Nuke). Download DBAN, burn it to a CD, boot from that CD and you will be able to wipe any drive in the system with multiple passes of random data. Eraser, above, also supports wiping whole drives and can create a “Nuke Disc” to boot from. DBAN, however is a personal favourite, and I’ve never had problems with using it. This should securely remove the data - although of course, nothing is as secure or cool as melting it - plus you get the added advantage of doing something cool to video and put on youtube!