The R&S®FT5066 trusted filter is developed for a
scenario consisting of a STANAG 5066 message
handling application involving a radio and/or modem
interface and a remote control protocol. The device
provides firewall functionality for the radio’s control
information. Inserted in the control path of a system,
the filter provides a strict red/black separation. This
ensures that only explicitly permitted control commands
are transmitted and prevents (un)intentional
data leakage over the control interface.
One aspect often neglected in a communications system
is the threat caused by the transmission of control information.
The path for control information is necessarily
nearly always plain. As a result, it can be deliberately or
unwittingly abused, e.g. through a programming error, to
circumvent the encryption mode and transmit sensitive
information openly. The R&S®FT5066 protects the control
path and prevents the accidental diversion of red data to
the black side of the system.
