H2SA-ALSH: A Privacy-Preserved Indexing and Searching Schema for IoT Data Collection and Mining

Algorithm 1

Indexing of H2SA-ALSH.

Input: a time series with objects interval ratio , and a threshold

Output: The number of disjoint K, K disjoint sets with blocks .

;

Compute ;

;

Whiledo

   ;

   Compute the bucket of the block using SRP-LSH hash family;

   ;

   ;

   Ifthen

      Build hash tables for of using ALSH;

   End

   Ifthen

      Insert into QALSH indexing of ;

   End

End

;

Return K, .