If the TPM setting is activated and backed up on to the USB memory, you can safely store in the TPM chip the encryption key (TPM key) that encrypts confidential information such as the password, public key pair for SSL communication, and user certificate that are stored in the machine. Doing so, you can prevent important information for the machine from leaking. Also, you can recover the system if the TPM chip fails by restoring the TPM key.
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IMPORTANT
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Before the TPM setting is activated, the System Manager must check that the default settings of the System Manger ID and System PIN (System Manger Settings) are changed. If the default settings of the System Manager ID and System PIN are not changed, user other than the administrator can backup and the TPM backup key may be taken. Since TPM key can only be backed up once, you cannot restore the TPM key.
Backup the TPM key immediately on to the USB memory after the TPM setting is activated.
For security reasons, you can only backup the TPM key once. Store the USB memory with the backup data in a safe place. Also, write down the password set when backing up and keep it in a safe place.
The security provided by TPM does not guarantee complete protection of the data and hardware. Note that Canon will not be liable for any failure or damages resulting from the use of this mode.
Insert the USB memory straight into the USB port. If the USB memory is inserted in an angle or if you insert a USB memory type not compliant with USB standard, the USB port may be damaged.
Do not remove the USB memory during backing up or restoring data. Doing so may cause damage to the USB memory, USB port, or the data inside of the USB memory. Also if the USB memory is removed when restoring, the machine may be damaged.
To use the USB memory, press [Preferences] (Settings/Registration) → [USB Settings] → [Off] for <Use MEAP Driver for External USB Device>.
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This section explains how to activate the TPM setting.
1.
Press 
(Settings/Registration).
(Settings/Registration). 2.
Press [Management Settings] → [Data Management] → [TPM Settings].
3.
Press [Yes].
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NOTE
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If the TPM setting is activated, it may take longer to start the machine.
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If the TPM setting is activated and the TPM chip fails, you cannot recover the confidential information since each type of confidential information is uniquely encrypted with the TPM key. Thus, immediately backup when the TPM setting is activated.
For backing up, use the commercially available USB memory.
1.
Press (Settings/Registration).
(Settings/Registration). 2.
Press [Management Settings] → [Data Management] → [TPM Settings].
3.
Press [Back Up TPM Key].
4.
Press [Password].
5.
Enter the password → press [OK].
6.
On the Confirm screen, enter the same password to confirm the password → press [OK] → [OK].
7.
Connect the USB memory to the machine → press [OK].
If the error screen appears, follow the instructions on the screen and backup again.
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IMPORTANT
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Before backing up, make sure that writing is allowed for the memory media connected to the machine.
Do not connect any other memory media.
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If the TPM chip fails, you can use the previously backed up data of the TPM key to restore the TPM key on to the new TPM chip. For information on TPM chip failure, contact your local authorized Canon dealer.
1.
Press (Settings/Registration).
(Settings/Registration). 2.
Press [Management Settings] → [Data Management] → [TPM Settings].
3.
Press [Restore TPM Key].
4.
Press [Password].
5.
Enter the password you specified when backing up → press [OK] → [OK].
6.
Connect the USB memory to the machine → press [OK].
If the error screen appears, follow the instructions on the screen and backup again.
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IMPORTANT
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Before restoring, make sure that the memory media you used for backing up is connected to the machine.
Do not connect any other memory media.
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7.
Press [OK] → restart the system.
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IMPORTANT
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Restoring of the TPM key recovers access to the HDD/SRAM that became inaccessible due to TPM chip failure, and does not recover the HDD/SRAM itself.
If initialization is performed following the steps for "Initializing All Data/Settings," all of the data encrypted by the TPM key is completely erased and the TPM setting becomes inactive.
For the backup of the TPM key, it is recommended that you use a USB memory with free space of 10 MB or more.
You can use the USB memory that is commercially available.
The FAT32 file system is supported for USB memory.
The following USB memory and usage are not supported.
USB memory with a security function or a memory card reader that connects via USB
Using the USB memory with an extension cable
Using the USB memory via a USB hub
USB memory not compliant with the USB standard
You may not be able to use properly, depending on the USB memory you are using.
When you are using USB memory, the machine cannot enter the Sleep mode. Also, the Weekly Timer settings are ignored.
You cannot access the machine during backing up or restoring data in the USB memory.
The data on the machine is backed up on the USB memory after it has been encrypted. You cannot manage or browse the backed up data on the computer.
You cannot back up the TPM key for the following cases:
USB memory is write protected
USB memory is not connected
More than one USB memory is connected
Not enough free space in the connected USB memory
TPM key does not exist on the machine
You cannot restore the TPM key for the following cases:
USB memory is not connected
More than one USB memory is connected
A TPM key does not exist on the USB memory
The TPM key on the USB memory is not correct
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NOTE
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The setting is effective only after you restart the machine (the main power switch is turned OFF, and then back ON). For instructions on restarting the machine (turning the main power switch OFF, and then ON), see "Main Power and Control Panel Power."
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