A Multibranch Search Tree-Based Multi-Keyword Ranked Search Scheme over Encrypted Cloud Data

Algorithm 1

GenAtomClusterList (D, μ).

	Input:
	The document set, D;
	The threshold of the maximum number of documents in an atom cluster, μ;
	Output:
	An atom cluster list, L;
(1)	Create a root cluster node r which has all documents of D;
(2)	GenBiSectingTree (r, μ);
(3)	InOrder (r, L);
(4)	return L;