Operator's Manual

Table Of Contents
14221-1850-2000, Rev. A
84
5.19.2 Zeroize Keys from Radio
It may be necessary to remove keys because of compromise or expiration.
To zeroize keys from the radio:
1. Press the Menu button.
2. Navigate to the SECURITY menu.
3. Scroll up or down to highlight ZEROIZE KEYS and press the Group/Channel Select Knob.
4. Press the YES softkey to remove the keys. This will also remove the keysets.
5.19.3 Protected Keys
The Protected Keys feature transfers P25 Voice Keys, from Harris Key Loader to the radio, that have been
wrapped (AES) or encrypted (DES) with Key Protection Keys (KPKs). KPKs are nothing more than
unprotected Key Encryption Keys (KEKs). The KPKs need to be loaded into the radio before the Protected
Keys are loaded. Once loaded into the radio, the KPKs are used to unwrap (AES) or decrypt (DES) the
Protected Keys.
5.19.4 Global Encryption
Global Encryption can be enabled when encryption keys are loaded on the radio and the selected
Zone/System is encrypted. When Global Encryption is enabled on the radio, a Global Key is used for all
encrypted transmissions until:
Global Encryption is disabled.
A new personality is activated.
The active keyset is changed.
The system is changed.
Global Encryption behavior is available on all channels that support encrypted communications.
To enable Global Encryption and/or change Global Encryption Key:
1. Press the Menu button.
2. Navigate to the SECURITY menu.