Wireless personal area network (Zigbee, Bluetooth, UWB) and wireless
identification technologies (Near Field Communication (NFC), Radio
Frequency Identification (RFID)) are implemented in particular client
server functions and communications. Connected with an Authentication
Server, a wireless HUB authenticates user identification and provides the
user with access to secure data communication with a wireless terminal
such as a cellular phone or a PDA. A Location Server provides user
locations via methods such as RSSI, TDOA, and GPS and sends location
information to a Center Control Server and the Authentication Server.
With location information, the Center Control Server initiates and
optimizes secure information processes and coordinates the functions of
servers and user terminals.