Chapter 7 Encryption; Universal Crypto Module Kits; Secure Interface Boards; Secure Dispatch Operation - Motorola ASTRO XTL 5000 Basic Service Manual

Chapter 7 Encryption

7.1

Universal Crypto Module Kits

NOTE: This information applies to both conventional and trunked systems.
The encryption modules use a custom encryption IC and an encryption key variable to perform their
encode/decode functions. The encryption key variable is loaded into the encryption module using a
key variable loader (KVL). The encryption IC corresponds to the particular encryption algorithm
purchased.
Table 7-1 contains the Universal Crypto Module (UCM) kits and their corresponding algorithms for
secure-equipped XTL 5000 radios.
Kit Number
NNTN4006
NTN9837
NTN9838
NTN9839
7.1.1

Secure Interface Boards

Table 7-2 contains the secure interface board kits, which are used in conjunction with the UCM kits.
Every secure-equipped radio must contain one of the two secure interface board kits, which is paired
with one of the UCM kits.
Kit Number
HLN6876
HLN6877
7.1.2

Secure Dispatch Operation

For personalities or talkgroups that are programmed to be secure-selectable, press and release the
Secure button to toggle between Secure and Clear.
• An illuminated secure status annunciator indicates that the transmitted signal will be encrypted
when the PTT button is pressed.
• The absence of the secure status annunciator indicates that the transmitted signal will not be
encrypted.

Table 7-1. UCM Kit Listing

DES, DES-XL, DES-OFB ENCRYPTION KIT–UCM
DES, DES-XL, DES-OFB WITH DVP-XL ENCRYPTION KIT–UCM
DVI-XL ENCRYPTION KIT–UCM
DVP-XL ENCRYPTION KIT–UCM

Table 7-2. Secure Interface Board Kits

Secure Interface Board, 3-day key retention
Secure Interface Board, 30-second key retention
Description
Description