Kyocera KM-3050 3050/4050/5050 Operation Guide Rev-3 (Advanced) - Page 290

Security Instructions for General Users (for Both General Users and Administrators) Security Kit Functions The security kit enables overwriting and encryption. NOTE: If you install the security kit, Running security function appears when the machine starts up and it may take a while. Overwriting Multi-functional products (MFPs) temporarily store the data of scanned originals and print jobs, as well as other data stored by users, in the hard disk, and the data is output from the hard disk for printing. As the data storage area used for such data remains in the hard disk as is until it is overwritten by other data, the data stored here remains restorable using special tools for undesirable use. The security kit deletes and overwrites (hereinafter collectively referred to as overwrite(s)) the unnecessary data storage area used for the output data or deleted data to ensure that data cannot be restored. Overwriting is performed automatically, without user intervention. NOTE: When you cancel a job, the machine immediately starts overwriting the data that has been already stored in the hard disk. Overwrite Methods There are two overwrite methods, which can be switched at any time. Once Overwrite Method Overwrite a target storage area of the hard disk (for overwriting) or entire hard disk (for system initialization) with zeroes to disable data restoration. 3-time Overwrite Method (default) Overwrite the same target storage area of the hard disk as mentioned above with a random pattern twice and then with zeroes to prevent data restoration. This method with its higher degree of security makes data restoration much more difficult than the Once Overwrite method even by a sophisticated restoration tool. This method may take more time than Once Overwrite method to process a larger amount of data. 8-2 ADVANCED OPERATION GUIDE