Encryption - Panasonic KX-UDS124 Administrator's Manual

3.2.6 Encryption

Example Provisioning Direction from the Server
The following figure shows an example NOTIFY message from the server, directing the SIP-CSs to perform
provisioning. The text "check-sync" is specified for "CFG_RESYNC_FROM_SIP".
NOTIFY sip:1234567890@sip.example.com SIP/2.0
Via: SIP/2.0/UDP xxx.xxx.xxx.xxx:5060;branch=abcdef-ghijkl
From: sip:prov@sip.example.com
To: sip:1234567890@sip.example.com
Date: Thu, 1 Jan 2009 01:01:01 GMT
Call-ID: 123456-1234567912345678
CSeq: 1 NOTIFY
Contact: sip:xxx.xxx.xxx.xxx:5060
Event: check-sync
Content-Length: 0
3.2.6 Encryption
Secure Provisioning Methods
In order to perform provisioning securely, there are 2 methods for transferring configuration files securely
between the SIP-CS and the server.
Which method is used depends on the environment and equipment available from the phone system.
Method 1: Transferring Encrypted Configuration Files
Unencrypted
configuration
file
To use this method, an encryption key is required to encrypt and decrypt the configuration files. A preset
encryption key unique to each SIP-CS, an encryption key set by your dealer, etc., is used for the encryption.
When the SIP-CS downloads an encrypted configuration file, it will decrypt the file using the same encryption
key, and then configure the settings automatically.
Method 2: Transferring Configuration Files Using HTTPS
This method uses SSL, which is commonly used on the Internet, to transfer configuration files between the
SIP-CS and server. For more secure communication, you can use a root certificate.
Notice
•
To avoid redundant data transfer over the network, important data, such as the encryption key used
to encrypt the configuration files and the root certificate for SSL, should be configured through
pre-provisioning as much as possible.
•
It is recommended that you encrypt the data in order to keep the communication secure when
transferring configuration files.
However, if you are using the SIP-CSs within a secure environment, such as within an intranet, it is
not necessary to encrypt the data.
To decrypt configuration files, the SIP-CS uses the encryption key registered to it beforehand. The SIP-CS
determines the encryption status by checking the extension of the downloaded configuration file.
For details about encrypting configuration files, contact the appropriate person in your organization.
158 Administrator Guide
CFG_FILE_KEY1
Encrypted
configuration
file
CFG_FILE_KEY1
Document Version 2013-03