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Chapter 3 — Configuring the Computer
741 and 751 Mobile Computers (Windows Mobile 5.0) User’s Manual 49
The 751 provides three types of security for your wireless network: Wi-Fi
Protected Access 2 (WPA2/802.11i), WPA, and WEP. 802.1x should be
referred to as an authentication method used for WPA and WPA2. Another
authentication method for WPA and WPA2 would be the Pre-Shared Key
(PSK).
Authentication Terminology
Acronym Description
EAP (Extensible
Authentication
Protocol)
802.11b/g uses this protocol to perform authentication. This is not
necessarily an authentication mechanism, but is a common
framework for transporting actual authentication protocols. Intermec
provides a number of EAP protocols for you to choose the best for
your network.
EAP-FAST
(Flexible
Authentication
via Secure
Tu n n e l i n g )
A publicly accessible IEEE 802.1X EAP type developed by Cisco
Systems. It is available as an IETF informational draft. An 802.1X
EAP type that does not require digital certificates, supports a variety
of user and password database types, supports password expiration
and change, and is flexible, easy to deploy, and easy to manage.
LEAP
(Lightweight
Extensible
Authentication
Protocol)
Also known as Cisco-Wireless EAP, provides username/password
based authentication between a wireless client and a RADIUS server.
In the 802.1x framework, traffic cannot pass through a wireless
network access point until it successfully authenticates itself.
EAP-PEAP
(Protected
Extensible
Authentication
Protocol)
Performs secure authentication against Windows domains and
directory services. It is comparable to EAP-TTLS both in its method
of operation and its security, though not as flexible. This does not
support the range of inside-the-tunnel authentication methods
supported by EAP-TTLS. Microsoft and Cisco both support this
protocol.
EAP-TLS
(Transport Layer
Security)
Based on the TLS (Transport Layer Security) protocol widely used to
secure web sites. This requires both the user and authentication server
have certificates for mutual authentication. While cryptically strong,
this requires corporations that deploy this to maintain a certificate
infrastructure for all users.
EAP-TTLS
(Tunneled
Tr a ns p or t L aye r
Security)
This protocol provides authentication like EAP-TLS but does not
require certificates for every user. Instead, authentication servers are
issued certificates. User authentication is done using a password or
other credentials that are transported in a securely encrypted tunnel”
established using server certificates.
EAP-TTLS works by creating a secure, encrypted tunnel through
which you present your credentials to the authentication server. Thus,
inside EAP-TTLS there is another inner authentication protocol that
you must configure via Additional TTLS Settings.
59


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