  In recent future, vehicles will establish a spontaneous connection over a
wireless radio channel, coordinating actions and information. Vehicles will
exchange warning messages over the wireless radio channel through Dedicated
Short Range Communication (IEEE 1609) over the Wireless Access in Vehicular
Environment (802.11p). Unfortunately, the wireless communication among vehicles
is vulnerable to security threats that may lead to very serious safety hazards.
Therefore, the warning messages being exchanged must incorporate an authentic
factor such that recipient is willing to verify and accept the message in a
timely manner
