Kenwood NEXEDGE NX-200 Function Reference page 450

17 COMMUNICATION SECURITY
17.3 Encryption (NXDN Digital)
17.3 Encryption (NXDN Digital)
Encryption is the function that enhances secrecy in communications on the NXDN digital channels by encrypting voice
data or user data such as a Short Message and a Long Message.
The Encryption function can provide bit scramble encryption using the encryption module embedded in a transceiver. The
Encryption function can offer AES/ DES encryption in addition to bit scramble encryption.
The Encryption function by means of AES/ DES provides more secure encryption than bit scramble encryption. To use the
Encryption function by means of AES/ DES, an optional Secure Cryptographic Module (hereinafter referred to as "SCM")
needs to be installed in the transceiver, and the encryption key data also needs to be configured for the SCM. (Refer to
Secure Cryptographic Module (SCM) (for AES/ DES Only) on page
While bit scramble encryption is enabled for the transceiver to transmit or receive a signal, the communication data can be
encrypted or decrypted using the encryption key data configured in the transceiver. For use with the AES/ DES encryption,
the communication data can be encrypted or decrypted using the encryption key data configured on the SCM.
Transmission
If Encryption is enabled, the transceiver encrypts and then sends voice data or user data such as a Short Message or a
Long Message. If Encryption is disabled, the transceiver transmits communication data without encryption.
Reception
Upon receipt of the encrypted communication data, the transceiver decrypts the received data using the encryption key
data configured in the transceiver or the SCM. If the data is properly decrypted, the received audio sounds from the
speaker. The receive behavior of the transceiver, however, differs depending on the Encryption status (enabled or
disabled) and the configuration for Encryption Type. Refer to
Communication Data on page 419
A maximum of 16 sets of encryption key data, such as the encryption key data for use with the Encryption function by
means of bit scramble and the encryption key data for use with the Encryption function by means of AES/ DES, can be
configured in the Multi-key List using KPG-111D/ DN. Status of encryption, either enabled or disabled, and the Multi-key
List Number having the encryption key data can be configured for each channel. (Refer to
Also, the Encryption status (enabled or disabled) and the encryption key data used for communications can be changed by
the transceiver operation.
Note
• Encryption can be used only in an NXDN Conventional system and NXDN Trunking system.
• Upon transmission using the Encryption function by means of AES/DES, the transmission cannot be done if no SCM is installed in the
transceiver, or if the SCM is disabled, or if no encryption key data corresponding to the Multi-key List Number is configured on the SCM.
In this case, a Key Fail Alert Tone sounds from the transceiver, and "KEY FAIL" appears on the transceiver main display for 1 sec.
• The communication data cannot be encrypted using the Encryption function by means of AES/ DES for GPS data transmission using
Data with Voice, or for data transmission using Transparent 1 or Transparent 2.
• The Encryption function of AES/ DES is not available for NX-200S/ NX-300S.
FUNC (K)/Ver 4.00
Transceiver's Behavior upon Receipt of the Encrypted
for details.
421.)
Multi-key List on page
CONTENTS
423.)
INDEX 416