Security Terms and Definitions
R&S
®
ZNH
7
Instrument Security Procedures 1334.6000.02 ─ 01
3
Security Terms and Definitions
Terms defined in Guidelines for Media Sanitization
NIST Special Publication 800-88
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Sanitization
"Media sanitization refers to a process that renders access to target data on the
media infeasible for a given level of effort."
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Clear
"Clear applies logical techniques to sanitize data in all user-addressable storage
locations for protection against simple non-invasive data recovery techniques; typi-
cally applied through the standard Read and Write commands to the storage
device, such as by rewriting with a new value or using a menu option to reset the
device to the factory state (where rewriting is not supported)."
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Purge
"Purge applies physical or logical techniques that render Target Data recovery
infeasible using state of the art laboratory techniques."
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Destroy
"Destroy renders Target Data recovery infeasible using state of the art laboratory
techniques and results in the subsequent inability to use the media for storage of
data."
Control of media
Another option is to keep physical media holding sensitive information within the classi-
fied area, see
Volatile memory
"Memory components that do not retain data after removal of all electrical power sour-
ces, and when reinserted into a similarly configured system, are considered volatile
memory components."
The volatile memory in the instrument does not have battery backup. It loses its con-
tents when power is removed from the instrument.
If the instrument is battery operated, e.g. handhelds, it retains data in the volatile mem-
ory as long as the battery is installed.
Typical examples are RAM, e.g. SDRAM.
Non-volatile memory
"Components that retain data when all power sources are discontinued are non-volatile
memory components."
.
In the context of this document, non-volatile memory components are non-user acces-
sible internal memory types, e.g. EEPROM, Flash, etc.
