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4 - 8 VC5000 Vehicle Computer Product Reference Guide
Table 4-7 lists the PEAP tunneled authentication options.
Table 4-8 lists the TTLS tunneled authentication options.
Table 4-7
PEAP Tunneled Authentication Options
PEAP Tunneled
Authentication
Description
MS CHAP v2 Microsoft Challenge Handshake Authentication Protocol version 2 (MS CHAP v2) is a
password-based, challenge-response, mutual authentication protocol that uses the
industry-standard Message Digest 4 (MD4) and Data Encryption Standard (DES)
algorithms to encrypt responses. The authenticating server challenges the access client
and the access client challenges the authenticating server. If either challenge is not
correctly answered, the connection is rejected. MS CHAP v2 was originally designed by
Microsoft as a PPP authentication protocol to provide better protection for dial-up and
virtual private network (VPN) connections. With Windows XP SP1, Windows XP SP2,
Windows Server 2003, and Windows 2000 SP4, MS CHAP v2 is also an EAP type.
TLS EAP TLS is used during phase 2 of the authentication process. This method uses a user
certificate to authenticate.
Table 4-8
TTLS Tunneled Authentication Options
TTLS Tunneled
Authentication
Description
CHAP Challenge Handshake Authentication Protocol (CHAP) is one of the two main
authentication protocols used to verify the user name and password for PPP Internet
connections. CHAP is more secure than PAP because it performs a three way
handshake during the initial link establishment between the home and remote
machines. It can also repeat the authentication anytime after the link is established.
MS CHAP Microsoft Challenge Handshake Authentication Protocol (MS CHAP) is an
implementation of the CHAP protocol that Microsoft created to authenticate remote
Windows workstations. MS CHAP is identical to CHAP, except that MS CHAP is
based on the encryption and hashing algorithms used by Windows networks, and the
MS CHAP response to a challenge is in a format optimized for compatibility with
Windows operating systems.