A Privacy-Preserved Analytical Method for eHealth Database with Minimized Information Loss

Algorithm 2

Privacy Tailor algorithm.

(1) Given ECG & Threshold;

(2) main(){

(3)   while(ok==0){  //Set ok = 1 when finish

(4)     recheck=0;

(5)     Node_information=compute(ECG);

         //Compute information loss and Re-ID risk

(6)     Re-id_risk=getRisk(Node_information);

(7)    if(Re-id_risk > Threshold){

(8)       target=Find_De-id_target();

(9)       De-id(target);

(10)     recheck=1;

(11)     node=0;

(12)     }

(13)     if(recheck!=1){

(14)      if(node_number == max){

(15)        ok=1; //Reach the last node and end the process

(16)      }

(17)       else{ node_number++; }

(18) }

(19)   }

(20) } // End of main

(21) Find_De-id_target(){

(22)   Compute aggregate risk for each node at each node;

(23)   Choose the highest risk node;

(24)   return node; }