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Ricoh Aficio SP C821DNT1 Design Guide - Page 14

Data Security, 3-1 External I/F, 3-2 Protection of Program Data from Illegal Access via an External

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Print Controller Design Guide for Information Security 1-3 Data Security 1-3-1 External I/F The MFP/LP is equipped with the following external interfaces: • Serial I/F for connection of external coin/card-operated devices. • Serial I/F for connection of peripheral devices (e.g. DF, Finisher, LCT). • Analog G3 FAX I/F (public telecommunications line), G4 FAX I/F (ISDN). • Standard IEEE 1284 parallel I/F (Host I/F), which can function as a two-way parallel interface when using a USB cable. • Standard IEEE 1394 I/F • 100BASE-TX and 10BASE-T compatible network I/F (Host I/F) • Gigabit Ethernet-compatible network I/F (Host I/F options, external controller I/F board) • Standard IEEE802.11b wireless LAN network I/F (Host I/F option) • Bluetooth I/F (Host I/F option) • USB2.0 Type B I/F (Host I/F) • USB2.0 Type A I/F (IC card, Pictbridge) 1-3-2 Protection of Program Data from Illegal Access via an External Device 1. All of the above principal machine functions, as well as software for all shared service layers, run on the UNIX operating system as independent processes (data/program modules). Memory space is allocated specifically for each module, which makes it impossible for one module to directly access the memory space of any other. 2. Data transfer between modules is Unix socket-based, whereby communication is performed along ID-protected communication paths. This ensures exclusive connections among the modules present in the MFP/LP, thereby preventing access by any module outside this pre-determined set. For example, incoming FAX data will only be sent to those modules designated to perform FAX data operations. This arrangement prevents illegal access to networks and internal programs from an outside line. 3. All image data stored on the HDD or stored temporarily in the Image Memory is managed by a memory control module called the MCS (Memory Control Service), which ensures that the data can only be accessed by specified machine function(s). In addition, this arrangement prevents illegal access to this data from an outside line. User data, such as the Address Book data stored in the HDD/flash ROM and User Code data stored in the NV-RAM, is managed by the UCS module. Access to this data is not possible by any module except those pre-determined modules in the MFP/LP itself. This arrangement ensures that the data stored in the MFP/LP cannot be accessed illegally via an external I/F. Page 14 of 86

Section	Page
04/23/2010	1
For these details, please refer to the Operating Instructions for the specific machine in question.	6
Hardware Configuration	7
MFP	7
LP	9
TPM (Trusted Platform Module): When the MFP/LP main power is turned on, this security module (chip) performs a verification on the validity of the software installed on the hardware platform, which includes checking for any illegal alterations.	10
Shared Service Layers	11
Principal Machine Functions	12
Data Security	14
External I/F	14
Protection of Program Data from Illegal Access via an External Device	14
IC card-based authentication functions: Authentication is mutual and encrypted, which prevents impersonation and ensures that data is properly protected.	16
Firmware Installation/Update	17
Remote Firmware Installation via Web SmartDeviceMonitor Professional IS (performed by the end user)	19
Verification of Firmware/Program Validity	20
Note: Produced by STMicroelectronics, TPM is a product of the ST19WP18 family, which has earned Common Criteria certification (EAL5+).	20
Authentication	21
IC Card Authentication	24
Access Control	25
In addition, it is possible to create an access control list (ACL) for each individual Address Book entry and Document Server document at both the individual user and group levels.	25
If the MLP/LP is initialized in this way, all of the user information, document data, and settings stored in the MLP/LP since installation will be initialized (erased).	26
Data Erase/Overwrite	27
To execute the overwrite, the operator can choose from two options: \	28
The execution of this feature does not clear engine-related information such as the value of the total counter, or engine-related adjustment settings contained in SP mode and UP mode.	28
Through this arrangement, the copy of the HDD storage key is automatically decrypted once the Encryption Key Restore has been completed.	31
Document Server Documents (MFP models only)	33
Access Privileges and Operations for Stored Documents	34
Without HDD: 500 entries	38
Overview of Capture Operations	39
Operations that Generate Captured Images	39
Capture Settings	41
Security Considerations	42
Captured Documents and Log Data	42
Additional Methods for Increased Security	42
(Authentication not required)	42
Copier (MFP Models Only)	43
Overview of Copier Operations	43
Data Security Considerations	43
Protection of Copy Jobs in Progress	43
Protection of Document Server Documents	43
Refer to 1.7.2 Document Server Documents (MFP models only) for details on the Document Lock feature.	44
Restricting the Available Functions for Each Individual User	45
Job/Access Log Data Collection	45
Print Backup	45
(printing out, editing, copying).	46
Overview of Printer Operations	47
Data Flow	47
Data Security Considerations	51
The \	53
Overview of Scanner Operations	54
Data Flow Security Considerations	54
Protection of Data when Performing Scanning and Sending Operations	55
Protection of Document Server Documents	56
Protection of Sending Results and Status Information	57
Protection of the Scanner Features Settings	57
Data Stored in the Job Log	58
Terminology	58
FTP (File Transfer Protocol): A protocol used when transferring files over a TCP/IP network.	58
Overview of FAX operations	59
Data Security Considerations	60
Protection of the Journal and Documents in Document Server Storage	61
Protection of FAX Transmission Operations	61
Protection of FAX Features Settings	62
The \	62
Job Log	62
Protection of Internet FAX Transmissions using S/MIME	62
Preventing FAX Transmission to Unintended Destination(s)	63
This prevents a FAX from being sent to an unintended destination when, for example, the operator accidentally touches an additional Quick Dial key.	63
Overview of NetFile Operations	64
Data Flow	65
Supplementary	65
Network Topology for a System Using Integration Server Authentication (Sample)	66
As long as the track ID is not stolen from the communication path between the PC and MFP/LP (which can be protected against by enabling SSL encryption) or from the PC itself, it is impossible to perform any unauthorized operations on these print jobs	68
Web Server Framework	69
WebDocBox (MFP models only)	70
For more details on job and access logs, please refer to 1.9 Job/Access Logs.	72
@Remote	73
Overview of @Remote Operations	73
Data Security Considerations	73
Security is increased even further by the fact that the symmetric key used is not a static key, but rather one that is generated every time a new session is initiated.	73
Overview of Copy Data Security Operations	74
Data Flow	75
Following this, an entry for the event itself is stored in the access log, along with the username.	75
Overview of Operations	77
1	77
Overview of SDK Application Functions	79
3: DSDK Œ MFP/LP Hardware Configuration	79
Scanning Functions: Sending Data Over the Network with the Copier and Scanner (MFP models only)	80
FAX Functions (MFP models only)	80
Network Functions	81
Printer Functions	81
Machine Administrative Functions (MFP models only)	81
Authentication Functions	81
Data Security Considerations	83
Preventing the Installation of Illegal Applications	83
Authentication of SDK Applications at Installation	83
Prevention of Access to Address Book Data and Machine Management Data	85
Protection Against Attacks on Principal MFP/LP Functions, Prevention of Damage to the System	85
Protection Against Attacks from External Sources	85

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Print Controller Design Guide for Information Security

Page 14 of 86

1-3

Data Security

1-3-1 External I/F

The MFP/LP is equipped with the following external interfaces:

•

Serial I/F for connection of external coin/card-operated devices.

•

Serial I/F for connection of peripheral devices (e.g. DF, Finisher, LCT).

•

Analog G3 FAX I/F (public telecommunications line), G4 FAX I/F (ISDN).

•

Standard IEEE 1284 parallel I/F (Host I/F), which can function as a two-way parallel interface when

using a USB cable.

•

Standard IEEE 1394 I/F

•

100BASE-TX and 10BASE-T compatible network I/F (Host I/F)

•

Gigabit Ethernet-compatible network I/F (Host I/F options, external controller I/F board)

•

Standard IEEE802.11b wireless LAN network I/F (Host I/F option)

•

Bluetooth I/F (Host I/F option)

•

USB2.0 Type B I/F (Host I/F)

•

USB2.0 Type A I/F (IC card, Pictbridge)

1-3-2 Protection of Program Data from Illegal Access via an External Device

All of the above principal machine functions, as well as software for all shared service layers, run on

the UNIX operating system as independent processes (data/program modules). Memory space is

allocated specifically for each module, which makes it impossible for one module to directly access the

memory space of any other.

Data transfer between modules is Unix socket-based, whereby communication is performed along

ID-protected communication paths. This ensures exclusive connections among the modules present in

the MFP/LP, thereby preventing access by any module outside this pre-determined set. For example,

incoming FAX data will only be sent to those modules designated to perform FAX data operations. This

arrangement prevents illegal access to networks and internal programs from an outside line.

All image data stored on the HDD or stored temporarily in the Image Memory is managed by a memory

control module called the MCS (Memory Control Service), which ensures that the data can only be

accessed by specified machine function(s). In addition, this arrangement prevents illegal access to this

data from an outside line.

User data, such as the Address Book data stored in the HDD/flash ROM and User Code data stored in

the NV-RAM, is managed by the UCS module. Access to this data is not possible by any module

except those pre-determined modules in the MFP/LP itself. This arrangement ensures that the data

stored in the MFP/LP cannot be accessed illegally via an external I/F.