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Security
Instructions for General Users
Security Kit Functions
Overwriting
8-2
(for Both General Users and Administrators)
The security kit enables overwriting and encryption.
NOTE:
If you install the security kit,
when the machine starts up and it may take a while.
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.
Running security function
ADVANCED OPERATION GUIDE
appears
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