Kenwood NX-5000 Series Function Reference page 138

3 COMMUNICATION SECURITY
3.3 Transceiver Behavior upon Receipt of Encrypted Communication Data
3.3 Transceiver Behavior upon Receipt of Encrypted
Communication Data
Upon receipt of the encrypted communication data, the transceiver behaves as follows according to the Encryption status
(enabled or disabled) and the configuration for Encryption Type.
If Encryption is enabled:
For audio data, regardless of the configuration for Encryption Type, the received audio sounds from the speaker according
to the audio control conditions and the configuration in Multi-key List.
In the case of user data such as Short Message, the behavior when receiving data is determined according to the registration
status of the Multi-key List.
0
Bit scramble encryption type
The bit scrambling format allows the transceiver to decrypt only encrypted audio data. Upon receipt of the encrypted audio
data, the transceiver decrypts the received data using the Encryption Key corresponding to the Multi-key List Number
that is configured for the channel on which the transceiver is waiting. If the data is properly decrypted, the received audio
sounds from the speaker. If the data is decrypted incorrectly, the received audio sounds incompletely from the speaker.
0
AES/ DES encryption type
When an encrypted signal is received, the transceiver searches for the Key ID (1 to 255) inside the SCM.
For audio data, if the Algorithm (AES or DES) and Key ID included in the Encryption Key used for encryption of the
received communication data match the Algorithm and Key ID included in the Encryption Key configured on the SCM,
the transceiver uses the Encryption Key to decrypt the data. If the data is properly decrypted, the received audio sounds
from the speaker. If the data is decrypted incorrectly, the received audio sounds incompletely from the speaker. The
transceiver mutes the speaker if the parameters for Algorithm do not match or if the Key IDs do not match.
When user data such as a Short Message is received, the transceiver decrypts the data in the same way. After the data
is successfully decrypted, the transceiver will proceed to receive the data. If decryption of the data is not successful, the
data will be discarded.
0
DES encryption type (Built-in DES)
When an encrypted signal is received, the transceiver searches for the Key ID (1 to 255) inside the Multi-key List.
For audio data, if the Algorithm (DES) and Key ID included in the Encryption Key used for encryption of the received
communication data match the Key ID included in the Encryption Key configured for the transceiver, the transceiver uses
the Encryption Key to decrypt the data. If the data is properly decrypted, the received audio sounds from the speaker. If
the data is decrypted incorrectly, the received audio sounds incompletely from the speaker. The transceiver mutes the
speaker if the parameters for Algorithm do not match or if the Key IDs do not match.
When user data such as a Short Message is received, the transceiver decrypts the data in the same way. After the data
is successfully decrypted, the transceiver will proceed to receive the data. If decryption of the data is not successful, the
data will be discarded.
0
Enhanced Encryption format
When an encrypted signal is received, the transceiver searches for the Key ID (1 to 255) in the Multi-key List.
For audio data, if the Key ID included in the Encryption Key used for encryption of the received communication data
matches the Key ID included in the Encryption Key configured for the transceiver, the transceiver uses the Encryption
Key to decrypt the data. If the data is properly decrypted, the received audio sounds from the speaker. If the data is
decrypted incorrectly, the received audio sounds incompletely from the speaker. The transceiver mutes the speaker if
the Key IDs do not match each other.
When user data such as a Short Message is received, the transceiver decrypts the data in the same way. After the data
is successfully decrypted, the transceiver will proceed to receive the data. If decryption is not successful, the data will
be discarded.
DMR FUNC (K, F)/Ver 2.20
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