Cisco 7906G - Unified IP Phone VoIP, Administration 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 7906G and 7911G for Cisco Unified Communications Manager 6.0
OL11954-01
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 an 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 3-17
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 configured in authenticated or encrypted mode 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 Phones 7906G and 7911G contains a
unique 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.
Table 1-3 Overview of Security Features (continued)
Feature Description