Overview Of Supported Security Features - Cisco 6901 Administration Manual

Understanding Security Features for Cisco Unified IP Phones

Overview of Supported Security Features

Table 1-5
support. For more information about these features and about Cisco Unified Communications Manager
and Cisco Unified IP Phone security, refer to Cisco Unified Communications Manager Security Guide.
Note Most security features are available only if a certificate trust list (CTL) is installed on the phone. For
more information about the CTL, refer to "Configuring the Cisco CTL Client" chapter in Cisco Unified
Communications Manager Security Guide.
Table 1-5 Overview of Security Features
Feature
Image authentication
Customer-site certificate installation
Device authentication
File authentication
Signaling Authentication
Manufacturing installed certificate
Cisco Unified IP Phone 6901 and 6911 Administration Guide for Cisco Unified Communications Manager 8.6 (SCCP and SIP)
1-12
provides an overview of the security features that the Cisco Unified IP Phone 6901 and 6911
Description
Signed binary files (with the extension .zz.sgn) prevent tampering with the firmware
image before it is loaded on a phone. Tampering with the image causes a phone to
fail the authentication process and reject the new image.
Each Cisco Unified IP Phone requires a unique certificate for device authentication.
Phones include a manufacturing installed certificate (MIC), but for additional
security, you can specify in Cisco Unified Communications Manager
Administration that a certificate be installed by using the Certificate Authority
Proxy Function (CAPF). See the
Phone" section on page 3-10
Occurs between the Cisco Unified Communications Manager server and the phone
when each entity accepts the certificate of the other entity. Determines whether a
secure connection between the phone and a Cisco Unified Communications
Manager should occur and, if necessary, creates a secure signaling path between the
entities by using TLS protocol. Cisco Unified Communications Manager will not
register phones unless they can be authenticated by the Cisco
Unified Communications Manager.
Validates digitally signed files that the phone downloads. The phone validates the
signature to make sure that file tampering did not occur after the file creation. Files
that fail authentication are not written to Flash memory on the phone. The phone
rejects such files without further processing.
Uses the TLS protocol to validate that no tampering has occurred to signaling
packets during transmission.
Each Cisco Unified IP Phone contains a unique manufacturing installed certificate
(MIC), which is used for device authentication. The MIC is a permanent unique
proof of identity for the phone, and allows Cisco Unified Communications Manager
to authenticate the phone.
Chapter 1 An Overview of the Cisco Unified IP Phone
"Configuring Security on the Cisco Unified IP
for more information.
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