Cisco Systems 6901 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 1-5provides an overview of the security features that the Cisco Unified IP Phone 6901 and 6911 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			Description
Image authentication			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.
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). 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 by 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 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.

	Cisco Unified IP Phone 6901 and 6911 Administration Guide for Cisco Unified Communications Manager 8.5 (SCCP and SIP)
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