Multi-keyword Stratified Search over Encrypted Cloud

Abstract—The advancement in cloud computing has motivated the data owners to outsource their complex data management systems from local sites to the commercial public cloud for great flexibility and economic savings. But for protecting data privacy, sensitive data have to be encrypted before outsourcing, which antiquates traditional data utilization based on plaintext keyword search. Thus, enabling an encrypted cloud data search service is of vital importance. Considering the large number of data users an