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Viking Portable 600 Radio Operating Manual
8-1
S
E C T I O N
Section 8
Secure Communication (Encryption)
This radio may be equipped to provide secure communication on some or all channels. 
This feature encrypts the voice so that it can be understood only by someone using a radio 
equipped with a similar encryption device and encryption codes.
When a secure call is received, the LED flashes Red. If equipped with the Clear/Secure 
option button and the current channel is programmed to allow button selection, secure 
communication can be manually enabled and disabled by that button. Otherwise, channels 
are strapped to Clear or Secure operation (see Section 8.3). Secure communication can be 
programmed on a per channel or per talkgroup basis to operate in various ways. More 
information follows.
8.1
Encryption Algorithms
This section provides information about encryption options for the Viking Portable 600 
radio.
8.1.1 Encryption Available With Various Channel Types
Analog Channels - On analog conventional and SmartNet/SmartZone channels, DES 
encryption provides secure communication.
Digital Channels - On conventional P25, SmartNet/Smart Zone, and P25 Trunking 
channels, the DES-OFB or AES-OFB protocol is used.
Preliminary Draft 3/9/12