Linux
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tools for wiping files, partitions and disks in GNU/Linux

Shred and secure-delete

http://www.freesoftwaremagazine.com/articles/shred_and_secure_delete_tools_wiping_files_partitions_and_disks_gnu_linux



windows
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leere Festplattenbereiche loeschen:
http://www.supportnet.de/fresh/2007/6/id1565711.asp

Dateien loeschen:
http://www.gerold-dreyer.de/Homepage/Anleitungen/Gebrauchsanleitungen%20zu%20Programmen/Eraser/eraserindex.htm