OO-ABMS: Online/Offline-Aided Attribute-Based Multi-Keyword Search

Recently, Attribute-Based Encryption (ABE) is used as a baseline technology for keyword searching mechanisms to cater users’ security and privacy-related concerns who outsource their data the powerful resource-rich cloud server. Almost all existing Keyword Searching (ABKS) schemes either operate on single-keyword or multiple; conjunctive-keyword search setting. These work premise of an “all-or-nothing” retrieval mode, which greatly limits capabilities. The most recent incorporates multi-keyword ranked in attribute-based encryption, improves user results accuracy flexibility mode. However, these demand high computation overhead, ultimately suffers efficiency. This dilemma prevents further research application ABKS schemes, especially mobile-resource constrained devices such mobile phones. paper proposes Online/Offline-aided Multi-keyword Search (OOABMS) scheme delegate laborious operations offline phase before acquiring access control policy keywords. An online then quickly assembles pre-computed index trapdoor with required specifics when it becomes known. Theoretical comparison simulation show that our more efficient practical real world scenario computing terms overhead flexibility.