Polycom IP 320 Administrator's Manual page 355

Note
Note
Central
(provisioning server)
It is recommended that all keys have unique descriptive strings in order to
allow simple identification of which key was used to encrypt a file. This makes
provisioning server management easier.
After encrypting a configuration file, it is useful to rename the file to avoid
confusing it with the original version, for example rename sip.cfg to sip.enc.
However, the directory and override filenames cannot be changed in this
manner.
You can check whether an encrypted file is the same as an unencrypted file by:
1. Run the configFileEncrypt utility on the unencrypted file with the "-d"
option. This shows the "digest" field.
2. Look at the encrypted file using WordPad and check the first line that
shows a "Digest=...." field. If the two fields are the same, then the
encrypted and unencrypted file are the same.
If a phone downloads an encrypted file that it cannot decrypt, the action is logged,
an error message displays, and the phone reboots. The phone will continue to do
this until the provisioning server provides an encrypted file that can be read, an
unencrypted file, or the file is removed from the master configuration file list.
Encrypted configuration files can only be decrypted on the SoundPoint IP 32x/33x,
430, 450, 550, 560, 650, and 670, the SoundStation IP 6000 and 7000 phones, and
the Polycom VVX 1500 phones.
The master configuration file cannot be encrypted on the provisioning server. This
file is downloaded by the BootROM that does not recognize encrypted files. For
more information, refer to
The following configuration file changes are required to modify this feature:
Configuration File: sip.cfg
Configuration file:
<device>.cfg
Master Configuration Files
Specify the phone-specific contact directory and the
phone-specific configuration override file.
For more information, refer to
<encryption/> on page A-109.
Change the encryption key.
For more information, refer to
Configuration on page A-157.
Miscellaneous Administrative Tasks
on page 2-5.
Encryption
Flash Parameter
C - 5