ENCRYPTION
AES-256 ENCRYPTION
ENVOY™ TRANSCEIVER REFERENCE MANUAL 353
AES-256 digital voice encryption
NOTE: AES-256 digital voice encryption may be used in conjunction with
AES-256 data encryption and CIVS.
NOTE: VCOM is used to provide virtual COM ports for programming secure
keys via KMS/KFS over the USB connector on the control point.
AES-256 digital voice encryption is an optional feature that provides high-grade
security for voice communications. This feature uses secure keys to provide secure
communications. The digital encryption operates using a Vocoder with rates of 1200
or 2400 bit/s. The display on the handset clearly indicates whether the transceiver is
secure or clear.
NOTE: You can change the prefix for the AES secure keys in Settings >
Security > Digital Key Prefix, using KMS, or via CICS.
Figure 66: Channel screen showing secure/clear status for AES-256 digital
voice encryption
Figure 67: Channel screen showing transmit/receive status for AES-256
digital voice encryption
CAUTION: When transmitting with the AES-256 digital voice encryptor, you must
wait 2 sec after holding PTT before speaking.
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.
Secure Clear
digital voice
data rate
secure index
for AES-256
secure key
digital
key prefix
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