I have heard of cases where people sold their old computers or harddisks and the buyer recovered their financial business data.
For example financial data, private emails, tracks of your internet surfing habits etc. And even after that some people (for example the three-letter-agencies) with special equipment are able to restore your data at least partially.Įverybody has sensitive data which they want to keep private. The file - you thought has gone forever - remains on the disk until another file is created over it (until another file overwrites the disk space where the “deleted” file is still stored), and even after that, it might be possible to recover the data by studying the magnetic fields on the disk platter surface using forensic equipment.īefore the file is overwritten by a new file, everyone can easily retrieve the data for example by using a disk undelete utility. Most operating systems only remove references to the file when they are asked to delete a file. When you delete a file using the default commands of the operating system (for example “rm” in UNIX or “del” in DOS or emptying the recycle bin in WINDOWS) the operating system does NOT delete the file, the contents of the file remains on your hard disk. The secure removal of data is not as easy as you may think.
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