Cisco 7941G - Unified IP Phone VoIP, Administration Manual

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Cisco Unified IP Phone 7961G/7961G-GE and 7941G/7941G-GE for Cisco Unified Communications Manager 6.1
OL-14620-01
Chapter 1 An Overview of the Cisco Unified IP Phone
Understanding Security Features for Cisco Unified IP Phones
Table 1-3 Overview of Security Features
Feature Description
Image authentication Signed binary files (with the extension .sbn) 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.
Customer-site certificate
installation 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). Alternatively, you can install a Locally Significant
Certificate (LSC) from the Security Configuration menu on the
phone. See the
“Configuring Security on the Cisco Unified IP
Phone” section on page 3-18 for more information.
Device authentication 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 Transport Layer Security (TLS) protocol. Cisco
Unified Communications Manager will not register phones unless
they can be authenticated by the Cisco Unified Communications
Manager.
File authentication 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.
Signaling Authentication Uses the TLS protocol to validate that no tampering has occurred to
signaling packets during transmission.
Manufacturing installed
certificate 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.