【摘要】 为了提高传统云环境下密文检索技术的查询准确率,在本体语义技术的基础上,提出了一种基于本体语义扩展的密文检索方案。通过构建混合云密文检索模型,将明文检索中的本体技术引入到密文检索,对查询关键词进行语义扩展,并利用本体中语义相似度过滤扩展结果,以更好地理解用户的查询意图。实验结果表明:在保证检索速度的同时,该方法能够提高检索结果的查准率。更多还原

【Abstract】 To improve the precision of traditional ciphertext retrieval techniques,a scheme of ciphertext retrieval in cloud based on ontology semantic expansion is proposed. The scheme brings the ontology into ciphertext retrieval by building a hybrid cloud ciphertext retrieval model. The ontology concept structure is used to expand the query keyword semantically. The extended results are filtered by the semantic similarity so as to understand the intention of the user better. Experimental results show that the method can improve the accuracy of the search results while ensuring the retrieval speed.更多还原