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The research of searchable symmetric encryption (SSE) has been focused on the trade-off between security, performance, and functionality. Recently proposed Hidden Cross-Tags (HXT) protocol improves the Oblivious Cross-Tags (OXT) by avoiding the leakage of 'Keyword Pair Result Pattern' (KPRP), at the cost of increasing the storage size by two orders of magnitude. In this paper, we reconsider the principle of designing SSE protocols to prevent KPRP leakage. At first, we introduce a new primitivedoi:10.1109/access.2020.3001014 fatcat:nx7b6s7kmffuraws7ofi5gyp4e