How to destroy sensitive information

The previous chapter mentioned, and discuss some of the tools and habits to help you protect your data your confidential information, but if you decide not to continue to retain some information again? If you determine, for example, just to keep copies of encrypted files that a sufficient number and want to delete the originals go, what was the best way to remove? Unfortunately for you is the answer more complicated than you think. When you delete a file, even if you've emptied the Recycle Bin selected, the content of the file is still somewhere on the system's hard drive and can be restored by somebody with the right tools in hand and a little luck case.