Result Pattern Hiding Searchable Encryption for Conjunctive Queries

We propose a new SSE protocol, called Hidden Cross-Tags (HXT), that removes 'Keyword Pair Result Pattern' (KPRP) leakage for conjunctive keyword search. We avoid this leakage by adopting two additional cryptographic primitives - Hidden Vector Encryption (HVE) and probabilistic (Bloom filter) indexing into the HXT protocol.
Read this paper in the ACM Digital Library: https://dl.acm.org/citation.cfm?id=3243753