User's Manual

ENCRYPTION
AES-256 ENCRYPTION
304 ENVOY™ TRANSCEIVER REFERENCE MANUAL
Figure 57: Channel screen showing secure/clear status for AES-256 digital
voice encryption
Figure 58: Channel screen showing transmit/receive status for AES-256
digital voice encryption
The AES-256 digital voice encryptor can use a key in secure index 0. This key may
be programmed at any time, by any user. This key cannot be programmed by KMS. If
all of the secure keys have been erased, the user can enter a new key into secure index
0 for immediate secure communications.
NOTE: This key must be the same across all transceivers that communicate
securely.
Related links:
Digital Key Prefix on page 239
Switching the encryptor on or off on page 101
Data rate
The data rate affects the speed with which digitally encrypted transmissions are sent.
The data rate is shown as either 1k2 (1200 bit/s) or 2k4 (2400 bit/s) in the centre of
the screen. Select 1k2 as the data rate in the first instance, then if good HF propagation
conditions exist, the 2k4 rate may be selected.
Secure Clear
Transmit Receive