• q0,q1,q2,q3,q4 represent the I/O query of each process. • R represents User modules that includes r1 is enter the region and r2 is enter query .
• N represents friend node connection where n1=allowing connection from node to compromised node.
• F represents the query forwarding process where q2 is a location appended query by compromised node and q3 is response from LBS.
• P represents the post-response forwarding process q3 is response from LBS to compromised node and q4 is response to original node.