Encryption; Zeroize Keys From Radio; Protected Keys - L3Harris XL Series Operator's Manual

14221-1850-2000, Rev. C
3. Scroll up or down to highlight TONE ENCODE and press the Group/Channel Select Knob.
4. Select the desired Tone Encode option from the list.

5.19 ENCRYPTION

5.19.1

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.
5.19.2

Protected Keys

The Protected Keys feature transfers P25 Voice Keys, from 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.
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