imageRUNNER ADVANCE C350iF/C250iF/C350P Series Service Guide
imageRUNNER ADVANCE C350iF/C250iF/C350P Series
Service Guide
July 2015
Revision 2
Page 23
3.
TPM (Trusted Platform Module)
TPM is a standard security chip (tamper resistant hardware) installed in
the imageRUNNER ADVANCE C350iF/C250iF/C350P Series machines.
The TPM provides a facility for the secure generation of cryptographic
keys, encrypts information stored on the internal HDD, and decrypts
information read from the internal HDD. The public keys to encrypt
confidential information are securely controlled by the TPM chip, and
they can only be decrypted if the TPM releases the associated
decryption key. If the HDD is removed from the machine, it will be
difficult to retrieve data off that HDD since the encryption key for that
data is stored in a separate location within the TPM.
CAUTION
Once the TPM setting is activated, if the end user fails to back up
the TPM key, or if the end user loses the TPM key, it may result in
permanent, unrecoverable data loss, for which Canon USA is not
liable. (See
on p. ii for further details.)
IMPORTANT
•
If the TPM setting is activated and the TPM chip fails, the confidential
information stored on the chip can only be recovered if Canon’s
service representative replaces the TPM chip and restores the original
TPM key to the new chip. Immediately, back up the TPM key on a
USB memory stick, after the TPM setting is activated.
•
Only the System Administrator of the machine can back up the TPM
key.
•
For security reasons, the TPM key can only be backed up once. Store
the USB memory with the backup data in a safe place.
•
For the backup of the TPM key, it is recommended that a USB
memory stick (supported system file: FAT32) with free space of 10
MB or more is used.
•
The TPM seals the hardware components associated with the data,
and the data cannot be accessed unless the specific TPM key is
issued by the TPM chip. Therefore, setting the TPM mode to ‘On’,
may affect service procedures and service costs (if not handled
properly). It is strongly recommended that the System Administrator
who has access to the TPM key be present for all service calls to
prevent the loss of data and productivity of the machine.
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