Privacy-Enhancing Preferential LBS Query for Mobile Social Network Users

Algorithm 2

Dynamic clustering.

Input: U Users, UT User trust factor, r Range, c Center, UP User profiles, x percentage change, and s Speed;

Output: UCH User cluster head;

1: whiledo

2:  if Head==NULL Head out of range == TRUE then

3:   Head Election(,r,c);

4:   if == Head then

5:     Cluster();

6:   end if

7:  end if

8:  if network change in percentage == x then

9:   if == Head then

10:    Cluster();

11:   end if

12:  end if

13: end while

14: return;