Description

torage services allow data owners to store their huge amount of potentially sensitive data, such as audios, images, and videos, on remote cloud servers in encrypted form. To enable retrieval of encrypted files of interest, many searchable symmetric encryption (SSE) schemes have been proposed. However, most existing SSE solutions construct indexes based on keyword-file pairs and focus on boolean expressions of exact keyword matches. Moreover, most dynamic SSE solutions cannot achieve forward privacy and reveal unnecessary information when updating the encrypted databases.