Privacy-Preserving -Means Clustering under Multiowner Setting in Distributed Cloud Environments

Algorithm 3

SETor  .

Require:  EW holds two encrypted values and ; AW holds the secret key .

 () EW:

   (a) Compute , , where ,

    ;

   (b) Generate a random number that ;

   (c) Compute , where ; Send to AW;

 () AW:

   (a) Decrypt ;

   (b) if then ; else ;

 () return ;