Lexmark C782 Інформація - Сторінка 3

Переглянути онлайн або завантажити pdf Інформація для Принтер Lexmark C782. Lexmark C782 9 сторінок. Hard disk and non-volatile memory guide
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About Hard Disk Technology on Lexmark Printers and MFPs

Hard disks on Lexmark devices are designed for device-specific functionality and are not

designed, nor can be used, as long-term storage for items unrelated to print and scan.

The basic architecture of these devices disallows the capability for users to extract

information, create folders, share the hard disk, create a network file share, or FTP

information to the device's hard disk directly from a client device.

The device hard disk is primarily designed to store print/image data, font data, forms

data, macros, and in some cases, job data. In addition, Lexmark uses hard disks for

temporarily buffering scan, fax, and copy data. In general, print-related data is processed

in Random Access Memory (RAM) unless the job exceeds the amount of RAM on the

device, or if the end user selects the confidential print and/or print and hold feature

enabled through the print driver.

Hard Disk Encryption

Why is Hard Disk Encryption needed?

A common concern for print devices is that residual job data from the print, copy, fax,

and scan processes will not be properly cleared prior to the device being removed from

a secure area and/or decommissioned at the end of life. This concern has led many

customers for look to additional hard disk protection mechanisms outside of disk wiping

to secure information. Hard disk encryption adds an additional layer of security to a

device's hard disk by encrypting all data that may be actively used by the device, sitting

idle on a device, and/or used by the device in a previous job. Disk encryption provides

the comfort that the hard disk can never be used in a device other than the one from

which it was originally encrypted.

How does Hard Disk Encryption work?

Lexmark devices have the ability to encrypt all data on their hard disks to protect it from

malicious access at all times. When this feature is enabled, all data written to the hard

disk is encrypted. This protects not only residual data left over after jobs, but also

protects data actively being used. This prohibits someone from maliciously powering off

the device in the middle of a job and making use of data abruptly left on the hard disk. If

an encrypted hard disk is removed and placed in another Lexmark device with hard disk

encryption enabled, the hard disk will verify its encryption key with the device's

encryption key. If the verified encryption key on the hard disk is different from the

device's encryption key, the device will reformat the hard disk with a new encryption key,

destroying the existing encrypted data on the hard disk.

When hard disk encryption is activated, the encryption key used (128-bit AES symmetric

encryption) is pseudo-randomly generated and stored in a proprietary fashion on the

device. Note that the key is not stored on the hard disk itself, so if the hard disk were

stolen from the device, the contents of the hard disk would remain indecipherable.

When the encryption function is activated, the hard disk is formatted and all data

contained on the hard disk is lost. Encryption is then applied to all data placed on the

hard disk, at all times.

Lexmark International, Inc.