RC4

Data is encrypted using the RC4 cipher. Note that the wireless workstation
does not authenticate the access point, so that there is no verifiable

means to make certain that the client is effectively talking to an authorized
access point on the WLAN.
The problem is that it is possible for attacks to occur when hackers
attempt to “spoof” authorized access points in order to “trick” wireless
workstations or mobile users into inadvertently connecting to the hacker’s
access point, thus compromising the wireless network and stealing
important information.