An "evil twin" is <A HREF="http://www.cnn.com/2005/TECH/internet/01/20/evil.twins/index.html">a bogus base station</A> that latches on to someone using new "Wi-Fi" wireless technology. Victims think their laptops or mobile phones are connected to bona fide wireless internet connections. They may then transmit valuable bank details or other personal information, not suspecting that they are being intercepted by cybercriminals.