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4.3
Transceiver Behavior upon Transmission of Encrypted
Communication Data
The behavior of the transceiver when the transceiver encrypts and sends communication data differs depending on the
configuration in
Encryption
for the P25 digital channel or the configuration in
Encryption
for the Talkgroup ID List as follows:
0
Clear
The transceiver always sends communication data without encrypting the data. Even if
Encryption
is enabled by
operating the transceiver, the transceiver sends communication data without encrypting the data.
0
Secure
The transceiver always encrypts and sends communication data. Even if
Encryption
is disabled by operating the
transceiver, the transceiver encrypts and sends communication data.
0
Select
The transceiver encrypts and sends communication data if
Encryption
is enabled. The transceiver sends communication
data without encrypting the data if
Encryption
is disabled.
Either “Secure” or “Select” needs to be configured in
Encryption
mentioned above in order to encrypt and send
communication data.
Note
0
The status of Encryption can be toggled between enabled or disabled by using the
Scrambler/Encryption
key or
Menu
key. (Refer to
Toggling the Encryption during Transmission between Enabled and Disabled
.)
0
If the Encryption Key (Key ID and Key Data) used to encrypt communication data is deleted, “Key Fail” appears on the
transceiver display and a Key Fail Alert Tone (6 beeps) sounds from the transceiver when the
PTT
switch is pressed to
transmit data. In this case, the transceiver cannot transmit.
Data Encryption
Whether to encrypt and send a Text Message, GPS data, or OTAP control data can be switched by toggling the status of
Scrambler/Encryption between enabled and disabled using the
Scrambler/Encryption
key or Menu Mode.
In a P25 Conventional system, the configuration for encrypting a Text Message, GPS data, or OTAP control data can be
done for each system.
If
KMF Profile
is disabled, data is encrypted according to each configuration in
Multi-key List Number
, regardless of the
OTAR configuration for the current channel. If
KMF Profile
is enabled, data is encrypted according to each configuration
in
EKR List Number
, regardless of the OTAR configuration for the current channel.
An icon indicating the encryption type for the transmitting channel appears during Text Messaging Mode or the length of
time from when the transceiver starts sending a Text Message or GPS data until the transceiver finishes the transmission.
An icon indicating the encryption type for the transmitting channel also appears during the length of time from when the
transceiver starts sending OTAP control data after entering OTAP Mode until the transceiver exits OTAP Mode.
Configuration using KPG-D1/ D1N
0
Configuring
Multi-key List Number
for data communications (
Transceiver Settings > Personal > Personal
Features > P25 Conventional (P25 Voting with NAC) > Encryption > Multi-key List Number)
0
Configuring
EKR List Number
for data communications (
Transceiver Settings > Personal > Personal Features
> P25 Conventional (P25 Voting with NAC) > Encryption > EKR List Number)
4 COMMUNICATION SECURITY
4.3 Transceiver Behavior upon Transmission of Encrypted Communication Data
P25 FUNC (K)/Ver 2.20
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