Just like PCs, today's digital office devices use a hard disk drive to store document data. Computer systems & networks are protected by firewalls, passwords & encryption. Despite the precautions of manufacturers, the data on your imaging & communication systems often remains vulnerable to industrial spying & information leaks. When the temporary data on the hard disk drive is compressed with Ricoh's unique compression method, it is virtually impossible to restore it to its original state. To double security, the data can be erased. To this end, Ricoh presents Data Overwrite Security Unit.