Cisco Systems 8961 manual Choose Administrator, Feature Description

Chapter 1 An Overview of the Cisco Unified IP Phone

Understanding Security Features for Cisco Unified IP Phones

	For information about current security settings on a phone, press		and choose Administrator
	Settings > Security Setup. For more information, see the “Security Setup Menu” section on page 7-13.
Table 1-6	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.
Image Encryption		Encrypted binary files (with the extension .sebn) 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 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 3-21for 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.
File encryption		Encryption prevents sensitive information from being revealed while the file is in
		transit to the phone. In addition 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.
Media encryption		Uses SRTP to ensure that the media streams between supported devices proves secure
		and that only the intended device receives and reads the data. Includes creating a media
		master key pair for the devices, delivering the keys to the devices, and securing the
		delivery of the keys while the keys are in transport.

	Cisco Unified IP Phone 8961, 9951, and 9971 Administration Guide for Cisco Unified Communications Manager 8.5 (SIP)
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