中文摘要：

从可搜索加密的两类基本问题出发,回顾了相关研究历史.介绍了可搜索加密的分类,包括其应用场景和应用模型,并探讨了相应的解决策略,从构造角度,将其分为对称可搜索加密和非对称可搜索加密.基于这种分类,围绕基本定义、典型构造和扩展研究,对可搜索加密相关工作进行了综述.最后,总结和展望了待解决的关键性问题和未来的研究方向.这些工作将对可搜索加密的进一步研究起到一定的促进作用.

英文摘要：

This paper reviews previous research on the two basic searchable encryption problems, and introduces the classification of searchable encryption （SE）, including its application scenarios and usage models. After discussing the resolution strategies, it divides SE into two groups, that is symmetric searchable encryption and asymmetric searchable encryption. Based on this classification, the research advance is surveyed on basic definition, typical eonstruetion and extended research. Finally, the need-to-be-solved problems and main research directions are discussed. This study aims at promoting further research of searchable encryption.