R&S ESW EMI Test Receiver Instrument Security Procedures

Transcription

1 EMI Test Receiver Instrument Security Procedures (;ÛÍÓ2) Test & Measurement Instrument Security Procedures

2 This document is applicable to all R&S ESW models Rohde & Schwarz GmbH & Co. KG Mühldorfstr. 15, München, Germany Phone: Fax: Internet: Subject to change Data without tolerance limits is not binding. R&S is a registered trademark of Rohde & Schwarz GmbH & Co. KG. Trade names are trademarks of the owners. The following abbreviations are used throughout this manual: R&S ESW is abbreviated as R&S ESW.

3 Contents Contents 1 Overview Battery Information Types of Memory and their Security Concerns Information Storage within the R&S ESW Information Security in Highly Sensitive Areas Performing Service, Calibration and Maintenance on the R&S ESW Performing Firmware Updates and Backing-Up User Data in Sensitive Areas Special Considerations for USB Ports Overview In many cases it is imperative that the R&S ESW be used in a secured environment. Generally these highly secured environments will not allow any test equipment to leave the area unless it can be proven that no user information will leave with the test equipment. Security concerns can arise when test equipment needs to leave a secured area to be calibrated or serviced. This document describes the types of memory and their usage in the R&S ESW. It also addresses methods of ensuring that no user data will leave the secured area should the product be removed for calibration or service needs. 2 Battery Information There are no batteries in the R&S ESW other than the one on the CPU board used to power the clock in the chipset. 3

4 Types of Memory and their Security Concerns 3 Types of Memory and their Security Concerns SDRAM The R&S ESW has several types of memory on different hardware components. 8 GByte of SDRAM on the CPU board. 2 GByte of SDRAM/DDR3 on the detector board. 6 GByte of SDRAM/DDR3 on the detector extension board. SDRAM is volatile memory and it loses its memory as soon as power is removed. The SDRAM will be unreadable within one minute after the power is removed from the instrument. The SDRAM is not a security concern. EEPROM The EEPROM does not hold user data nor can the user access the EEPROM storage. The EEPROM is not a security concern. FLASH The CPU board of the R&S ESW has a 8 MByte flash memory device which contains the BIOS. The FLASH memory device does not hold user data nor can the user access the flash memory. The FLASH memory is not a security concern. Removable Solid-State Drive The R&S ESW is equipped with a removable solid-state (flash) drive. The solid-state drive is used to store: Instrument operating system (Windows 7, 64 bit) Instrument firmware and firmware options (measurement personalities) with option license keys Instrument states and setups Trace data Limit lines, transducer tables Screen images The solid-state drive content is non-volatile, so nothing is lost when power is removed from the instrument. Furthermore, an optional Secure User Mode (R&S ESW-K33) is available, in which the instrument's solid-state drive is write-protected. Thus, no user data can be written to the solid state drive permanently (see also "Secure user Mode (R&S ESW-K33)" on page 5). The solid-state drive is not a security concern because it can be physically removed from the instrument and left in the secure area. 4

5 Information Storage within the R&S ESW 4 Information Storage within the R&S ESW Data SDRAM Not a security concern EEPROM Not a security concern FLASH Not a security concern Removable solid-state drive Not a security concern Temporary information storage for CPU operation (CPU cache and swap area) Hardware info, serial number, product options and calibration correction constants X X X BIOS X Operating system and instrument firmware Instrument states, setups, limit lines and transducer tables Trace data, measurement results and screen images (X)* (X)* X X X *) only if optional Secure User Mode (K33) is active 5 Information Security in Highly Sensitive Areas Since the SDRAM is erased when power is removed from the R&S ESW it does not pose a security risk. No user data is written to the EEPROM and FLASH memories; hence, it is deemed that they do not pose a risk either. The Removable solid-state drive is the only device that does not lose its memory when power is removed and can contain user data. It can be removed from the R&S ESW, leaving the customer assured that no user data is stored within the R&S ESW. Secure user Mode (R&S ESW-K33) If it is not possible to remove the solid-state drive and store it securely, or if users must not obtain knowledge of other user's data, an optional Secure User Mode (R&S ESW- K33) is available. In secure user mode the instrument s solid-state drive is write-protected so that no information can be written to memory permanently. Data that the R&S ESW normally stores on the solid-state drive is redirected to volatile memory instead, which remains available only until the instrument is switched off. 5

6 Performing Service, Calibration and Maintenance on the R&S ESW Data that is stored in volatile memory can be accessed by the user just as in normal operation; however, when the instrument s power is removed, all data in this memory is cleared. Thus, in secure user mode, the instrument always starts in a defined, fixed state when switched on. The R&S ESW equipped with the REMOVABLE SOLID-STATE DRIVE address the needs of customers working in highly sensitive areas. 6 Performing Service, Calibration and Maintenance on the R&S ESW R&S ESW equipped with the removable solid-state drive Before performing service, calibration, or maintenance tasks on the R&S ESW, remove the classified solid-state drive (with the user data). This can be done without opening the instrument. To remove the solid-state drive IMPORTANT - SHOCK HAZARD: Switch off the instrument and disconnect the power plug before removing the solid-state drive! Unscrew the two knurled screws and remove the solid-state drive at the back of the device. This removes all user data from the R&S ESW. The R&S ESW, without the removable solid-state drive, can now leave the secured area. 6

7 Performing Firmware Updates and Backing-Up User Data in Sensitive Areas Once the R&S ESW is outside the secured area, installing a second non-classified removable solid-state drive (without any user data), allows the R&S ESW to function properly for service or other needs. Prior to re-entering the secured area, remove the non-classified removable solid-state drive (without the user data). When the R&S ESW is back within the secured area, the original classified removable solid-state drive can be reinstalled. To hold classified user data in the secure areas, use the REMOVABLE solid-state drive which comes with the instrument. To hold non-classified user data in the non-secure areas, use a second REMOV- ABLE (optional) solid-state drive. Validity of the Instrument s Calibration After Exchanging the Removable Hard Disk The calibration ensures the user that their measurements are traceable to a government standard. Rohde & Schwarz highly recommends that users follow the calibration cycle suggested for their instrument. The EEPROM is the only memory type used to hold permanent adjustment values required to maintain the validity of the R&S ESW's calibration. Hence, replacing one removable solid-state drive with another does not affect the validity of the instrument s calibration. After exchanging the removable solid-state drive, perform a self-alignment once, by selecting "SETUP > Alignment > Start Self Alignment". This function uses the high-stability internal reference generator to produce the temporary adjustment values. Using the permanent and temporary values, the necessary adjustment information is then stored on the removable solid-state drive. Rohde & Schwarz recommends that users perform the self-alignment function on a weekly basis after the R&S ESW has had sufficient time to warm-up. 7 Performing Firmware Updates and Backing- Up User Data in Sensitive Areas Rohde & Schwarz highly recommends, but does not require, the users of its products to maintain their products with the latest updates and to regularly backup important user data that can be erased. Firmware updates are available from the Rohde & Schwarz website. How does a user perform firmware updates and backup user data in sensitive areas? There are several options available for the user to safely perform these operations without compromising the security of the sensitive areas. 7

8 Special Considerations for USB Ports Secure User Mode If Secure User Mode is activated (see "Secure user Mode (R&S ESW-K33)" on page 5), firmware updates cannot be performed. In this case, deactivate the secure user mode for the duration of the update. Via the USB port The R&S ESW is equipped with USB ports as standard equipment. The instrument firmware update can be performed directly from the USB stick. The USB stick can likewise hold or transport user data back-ups to an approved storage medium. As described in Special Considerations for USB Ports, users can disable the capability of the USB ports to save data (set to "read only"). For users that have not elected to disable the USB ports for writing data, a memory stick can be used to backup user data. Via the LAN interface The R&S ESW is equipped with a LAN interface as standard equipment. A user can transport the firmware update into the secure area via a CD or another medium that meets the security requirements. The update can then be placed on a system on the LAN within the secure area. The R&S ESW can be updated directly from the LAN. The LAN can likewise be used to backup user data to an approved storage medium. 8 Special Considerations for USB Ports USB ports can pose a security threat in high-security locations. Generally, this threat comes from small USB pen drives (also known as memory sticks, key drives, etc.) which can be very easily concealed, yet can quickly read or write several GBytes of data. Disable USB Ports for Writing User Data The R&S ESW can be updated with the USB Write Protection Utility to disable the write capability on any USB port for storage devices. This utility is available from the R&S ESW product web site without any charge. To disable the write capability copy the utility software to the R&S ESW and run it once. After reboot of the instrument the write capability on any USB memory device is disabled. 8