 a technology specification for interoperability of next-generation WLAN products, the Enhanced Wireless Consortium (EWC; www.enhancedwirelessconsortium.org) was formed. The 802.11n Working Group approved the EWC's specification as the draft approval of 802.11n in January 2006. WLAN Security The flaws in Wi-Fi security have given rise to war drivers-individuals who drive through an area, scan for wireless networks (using programs such as NetStumbler), WLANs and publish their findings on the Web. The term is derived from war dialing, a method hackers use to locate nonsecure computers by dialing through phone numbers. The original 802.11b security mechanism is static WEP. Static WEP uses a 40- or 104-bit encryption key, which is manually entered and applied and then is not typically changed. WEP has been shown to be easily compromised and is generally not considered secure. Programs such as AirSnort can obtain encryption keys. Most wireless networks fail to make use of even WEP. The good news is that WEP is not the only available WLAN security mecha- nism. The continuum of IEEE wireless security standards also includes static WEP with initialization vector (IV), dynamic WEP, WPA, and WPA2. Static WEP with IV Static WEP is today often enhanced with IV, a 24-bit "starting point" value appended to basic WEP. Adding 24 bits to a WEP key results in 64- or 128-bit composite key values. Static WEP with IV is supported by all current VoWLAN handsets. Dynamic WEP Dynamic WEP, which has generally replaced static WEP, is an incremental security improvement over basic static WEP. It involves mutual authentication using 802.1X and generation of unique encryption keys for each associated client. WPA is the current state-of-the-art in standards-based WLAN security. It is an enhanced wireless security environment that replaces dynamic WEP. WPA includes three main elements: Temporal Key Integrity Protocol (TKIP)-TKIP, based on RC4 encryption, uses a 304-bit key (a 128-bit base key plus a 128-bit IV plus the 48-bit MAC address) and 