基于MRDI的关键词语义扩展密文检索技术研究

Ciphertext Retrieval Technology of Keywords Semantic Extension based on MRDI

面向云环境中精确密文检索需求,设计了一种多属性、双索引(Multi-Rationality for Dual-Indexing,MRDI)检索方案。检索时对查询关键词进行语义扩展,并利用语义相似度过滤扩展结果来获得扩展查询集,以便更好地理解用户查询意图。从建索和检索两方面改进传统密文检索方案,高效检索出包含对应关键词的文件目录信息,同时提高了查准率。实验结果表明,该方案具有高效性和可行性。

To meet the increasing demand of accurate ciphertext retrieval in cloud environment,MRDI(Multi-Rationality for Dual-Indexing)ciphertext retrieval solution is proposed and designed.Before searching in the index,the semantic of the query keywords supplied by users is expanded.And then expansion result is filtered,thus to obtain an extended query set by semantic similarity,so that the query intention of the user may be fairly understand.The traditional ciphertext retrieval solution is improved from the two aspects of index creating and retrieval processing.And the file directory information containing the corresponding keywords is efficiently retrieved,and meanwhile the accuracy significantly rose.Finally the experiment results indicate the high efficiency and feasibility of this solution.