Encryption Key Loading Guide
5
© Tait Electronics Limited September 2006
Encryption Overview
When you enter a key into the , you need to specify a Common
Key Reference (CKR). This is the reference number for a set of secure key
data.
This key data consists of the following information:
■
Key ID, used to identify the key over the air to the device decrypting the
call.
■
Algorithm ID, which specifies which encryption algorithm is to be used
(DES-OFB or AES).
■
Key variable, a multi-digit number that the crypto-module uses when
encrypting and decrypting.
In addition, the Tait TM9000/TP9000 programming software (for mobiles
and portables) or Customer Service Software (for the P25 Console Gateway)
gives each CKR a name. Only the CKR is visible to the software.
Motorola
Key fill device
Key
loading
CKR 1
KeyID = 3
Alg = DES
Key variable:
**********
**********
**********
CKR 3
KeyID = 3
AlgID = DES
Key variable:
**********
**********
**********
CKR 2
KeyID = 3
AlgID = DES
Key variable:
**********
**********
**********
CKR 1
KeyID = 3
Alg = DES
Key variable:
**********
**********
**********
