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Cisco 7971G-GE Manual

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Chapter 1 An Overview of the Cisco Unified IP Phone
Understanding Security Features for Cisco Unified IP Phones
1-16
Cisco Unified IP Phone 7970G/7971G-GE for Cisco Unified Communications Manager 6.0
OL-12232-01
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 CAPF
1
. Alternatively, you can install an
LSC from the Security Configuration menu on the phone. See the
“Configuring Security on the Cisco Unified IP Phone” section on
page 3-17 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 using
TLS protocol. Cisco Unified Communications Manager does 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.
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