Cisco Systems 7940G, 7960G manual Overview of Supported Security Features, Feature Description

Chapter 1 An Overview of the Cisco Unified IP Phone

Understanding Security Features for Cisco Unified IP Phones

Overview of Supported Security Features

		Table 1-3provides an overview of the security features that the Cisco Unified IP Phones 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.
		For information about current security settings on a phone, choose Settings > Security Configuration.
		For more information, see the “Security Configuration Menu” section on page 6-12.
	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 1-3	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			Each Cisco Unified IP Phone requires a unique certificate for device authentication.
installation			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. 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 3-10for 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 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			Each Cisco Unified IP Phone contains a unique manufacturing installed certificate (MIC),
certificate			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.
Secure SRST reference			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.

Cisco Unified IP Phone 7960G/7940G Administration Guide for Cisco Unified Communications Manager 7.0 (SCCP)

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