NETGEAR WG102 - ProSafe Wireless Access Point Reference Manual page 108

Reference Manual for the NETGEAR ProSafe 802.11g Wireless Access Point WG102
Wi-Fi Alliance (formerly WECA – Wireless Ethernet Compatibility Alliance)
The Wi-Fi Alliance is a nonprofit international association formed in 1999 to certify interoperability of
wireless Local Area Network products based on IEEE 802.11 specification. Currently the Wi-Fi Alliance
has 193 member companies from around the world, and 509 products have received Wi-Fi certification since
certification began in March of 2000. The goal of the Wi-Fi Alliance's members is to enhance the user
experience through product interoperability (www.weca.net).
Wi-Fi Protected Access (WPA)
WPA is a security technology for wireless networks that improves on the authentication and encryption
features of WEP (Wired Equivalent Privacy). In fact, WPA was developed by the networking industry in
response to the shortcomings of WEP.
One of the key technologies behind WPA is the Temporal Key Integrity Protocol (TKIP). TKIP addresses
the encryption weaknesses of WEP. Another key component of WPA is built-in authentication that WEP
does not offer. With this feature, WPA provides roughly comparable security to VPN tunneling with WEP,
with the benefit of easier administration and use. This is similar to 802.1x support and requires a RADIUS
server in order to implement. The Wi-Fi Alliance will call this, 'WPA-Enterprise.'
One variation of WPA is called WPA Pre Shared Key or WPA-PSK for short - this provides an
authentication alternative to an expensive RADIUS server. WPA-PSK is a simplified but still powerful form
of WPA most suitable for home Wi-Fi networking. To use WPA-PSK, a person sets a static key or
passphrase as with WEP. But, using TKIP, WPA-PSK automatically changes the keys at a preset time
interval, making it much more difficult for hackers to find and exploit them. The Wi-Fi Alliance will call
this, 'WPA-Personal.'
Wi-Fi Protected Access and IEEE 802.11i Comparison
Wi-Fi Protected Access will be forward-compatible with the IEEE 802.11i security specification currently
under development by the IEEE. Wi-Fi Protected Access is a subset of the current 802.11i draft, taking
certain pieces of the 802.11i draft that are ready to bring to market today, such as its implementation of
802.1x and TKIP. These features can also be enabled on most existing Wi-Fi CERTIFIED products as a
software upgrade. The main pieces of the 802.11i draft that are not included in Wi-Fi Protected Access are
secure IBSS, secure fast handoff, secure de-authentication and disassociation, as well as enhanced
encryption protocols such as AES-CCMP. These features are either not yet ready for market or will require
hardware upgrades to implement.
Wi-Fi Protected Access for the Enterprise
Wi-Fi Protected Access effectively addresses the WLAN security requirements for the enterprise and
provides a strong encryption and authentication solution prior to the ratification of the IEEE 802.11i
standard. In an enterprise with IT resources, Wi-Fi Protected Access should be used in conjunction with an
authentication server such as RADIUS to provide centralized access control and management. With this
implementation in place, the need for add-on solutions such as VPNs may be eliminated, at least for the
express purpose of securing the wireless link in a network.
Glossary
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November 2005