XML configuration files encrypted with openssl can be decrypted by the phone using the profile rule [--key “TheSuperSecretPhrase”] http://......
The issue is that if a user accesses the web-portal for the phone, he/she can glean TheSuperSecretPhrase through simple inspection.
Why not add an Encryption Key field under the Provisioning tab, which can be used as the Key (perhaps as $EK?). You could have it as a text field of type "password", i.e., not displayable?
I know, you could use the GPP_S[ABCD] parameters for the same purpose, but the above suggestion has the added advantage of being an end-user editable field (much, *much* easier to do phone resets in the field!)
Configure Multicast Paging on the Cisco IP Phone 7800 Series or 8800 Series Multiplatform Phone
The Cisco IP Phone 7800 and 8800 Series Multiplatform Phones provide voice communication over an Internet Protocol (IP) network...
Add Call Park on a Cisco 7800 or 8800 Series Multiplatform Phone Key Expansion Module
Call park allows the user of the phone to put an incoming call on hold so that the call can be retrieved on another phone. A call is park...