A Survey Paper of Proximity-Based Security Techniques for Mobile Users in Wireless Networks Multi Level Location Based Session Aggregator

In this system, the proximity based authentication and multi level session key establishment are implemented based on spatial temporal location tags. Constituting the unique physical features of the signals sent from multiple ambient radio sources, the attacker cannot easily forged the location tags. More specifically, each radio DDS builds a public location tag according to the received signal sequence numbers, strength indicators and media access control (MAC) addresses of the ambient packets. Each DDS also keeps a secret location tag that consists of the packet arrival time information to generate the multi level session keys. As DDSs never disclose their secret location tags and this system is robust against spoofers and eavesdroppers outside the proximity range.