Konica Minolta bizhub 751 - Manual (Page 72)

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Administrator Operations 2
2.11 Protecting Data in the HDD
When access to the Administrator of the machine by the Administrator Settings is authenticated, the machine
enables the operation for setting and changing the HDD Lock Password. It also enables the operation for
setting and changing the Image Data Encryption Passphrase when the optional Security Kit SC-506 is
mounted.
Should the HDD be removed unawares, the HDD Lock Password locks the HDD protecting data contained
in the HDD. Furthermore, by setting the Image Data Encryption Passphrase, encrypt the image data which is
registered by secure print or the image data which is saved in the user boxes and protect the data. The HDD
Lock Password and Image Data Encryption Passphrase entered are displayed as "*."
2
Note
Do not set any number that can easily be guessed from birthdays, employee identification numbers,
and the like for the HDD Lock Password and Image Data Encryption Passphrase. Try to change the
password at regular intervals.
Make sure that nobody but the Administrator of the machine comes to know the HDD Lock Password
or Image Data Encryption Passphrase.
If only the Image Data Encryption Passphrase is to be set while the machine is being used without
setting the HDD Lock Password or Image Data Encryption Passphrase, the Service Engineer must
perform some setting procedures in advance. For more details, ask the Service Representative.
2
Reminder
When the HDD Lock Password is set, HDD verification is carried out when the machine is started. If the
HDD has been improperly replaced with another, or if the HDD Lock Password is yet to be set, a
message appears that tells that there is a mismatch between the HDD and the HDD Lock Password.
Further, the HDD has the following function. That is, if the HDD is illegally removed or replaced with
another, detection of a wrong HDD Lock Password five consecutive times will lock the authentication
function. Leak of data can thus be prevented.
When an Image Data Encryption Passphrase (encryption word) is set using HDD Encryption Setting, an
Image Data Encryption Passphrase with a key length of 256 bits is generated using the SHA-256
algorithm. The generated Image Data Encryption Passphrase is used to encrypt or decrypt data through
AES encryption algorithm.
2.11.1 Setting the HDD Lock Password
2
Note
When the main power switch is turned off, then on again, wait at least 10 seconds to turn it on after
turning it off. if there is no wait period between turning the main power switch off, then on again, the
machine may not function properly.
Here is the sequence, through which the main power switch and sub power switch are turned on and
off:
Turn off the sub power switch
→ Turn off the main power switch → Turn on the main power switch → Turn
on the sub power switch
Do not leave the machine with the setting screen of Administrator Settings left shown on the display. If
it is absolutely necessary to leave the machine, be sure first to log off from the Administrator Settings.