Cisco 7970G - IP Phone VoIP Administration Manual page 35

Chapter 1 An Overview of the Cisco Unified IP Phone
Table 1-3 Overview of Security Features (continued)
Feature
Secure SRST reference
(SCCP phones only)
Media encryption
Signaling encryption
(SCCP phones only)
CAPF (Certificate Authority
Proxy Function)
Security profiles
Encrypted configuration files
Optional disabling of the web
server functionality for a phone
Cisco Unified IP Phone 7970G/7971G-GE Administration Guide for Cisco Unified Communications Manager 6.1
OL-14626-01
Understanding Security Features for Cisco Unified IP Phones
Description
After you configure a SRST reference for security and then reset the
dependent devices in Cisco Unified Communications Manager
Administration, the TFTP server adds the SRST certificate to the
phone cnf.xml file and sends the file to the phone. A secure phone
then uses a TLS connection to interact with the SRST-enabled
router.
Uses SRTP to ensure that the media streams between supported
devices proves secure and that only the intended device receives and
reads the data. Includes creating a media master key pair for the
devices, delivering the keys to the devices, and securing the delivery
of the keys while the keys are in transport.
Ensures that all SCCP signaling messages that are sent between the
device and the Cisco Unified Communications Manager server are
encrypted.
Implements parts of the certificate generation procedure that are too
processing-intensive for the phone, and it interacts with the phone
for key generation and certificate installation. The CAPF can be
configured to request certificates from customer-specified
certificate authorities on behalf of the phone, or it can be configured
to generate certificates locally.
Defines whether the phone is nonsecure, authenticated, or
encrypted. See the "Understanding Security Profiles" section on
page 1-19 for more information.
Lets you ensure the privacy of phone configuration files.
You can prevent access to a phone's web page, which displays a
variety of operational statistics for the phone.
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