User's Manual

ENCRYPTION
AES-256 ENCRYPTION
ENVOY™ TRANSCEIVER REFERENCE MANUAL 311
Installing the driver for the cable
The cable requires a specific driver to be installed on the computer. A driver is
available on the RC50-C Installation CD or from
www.ftdichip.com/Drivers/VCP.htm. Select the latest Windows®-certified driver
that is suitable for your computer.
To install the driver for the cable:
 Insert the RC50-C Installation CD into the CD drive of the computer to which
the cable is connected.
 Click on Install RC50-C.
The driver comes packaged with the software. It remains present even if
RC50-C is uninstalled.
 If the driver provided on the RC50-C Installation CD is not suitable for your
computer, do the following:
• Download a suitable Windows®-certified driver from
www.ftdichip.com/Drivers/VCP.htm.
• Double-click on the self-extracting .exe file.
NOTE: Some older drivers are delivered as a zip file. Extract the files
(using folder names) from the zip file. Right-click on the
ftdibus.inf file, then select Install.
Using AES-256 digital data encryption
The RM50e stores the secure keys and provides the secure encryption and decryption.
The transceiver provides the interface to the RM50e and control of key selection and
secure status. An email message is sent via your email client to the RC50-C HF email
software, which passes it to the RM50e for encryption. The RM50e passes the
message to the transceiver, which transmits it over the air.
To use AES-256 digital data encryption:
 Launch the RC50-C HF Email software, then click Go Online to activate the
RM50e HF Data Modem.
The transceiver responds with a beep.
 If you are using a 2220 Handset or 2230 Desk Console, press
SEC.