Random Secure Comparator Selection Based Privacy-Preserving MAX/MIN Query Processing in Two-Tiered Sensor Networks

Algorithm 1

rsc_compare.

Input: secure comparators and

Output: if , 1 is returned, if ,

     is returned, and , 0 is resturned,

Procedures:

If , then return 0;

If , then

  If , then return 1;     //means ;

  Else, return ;         //means ;

Else

  If , then return ;     //means ;

  Else, return 1;            //means ;