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中文摘要：
云计算中对外包数据加密给数据查询带来挑战，为提高数据的安全性和查询的准确率，克服现有加密算法本身存在的一些弱点，把外包数据进行分割，对分割变换后的数据进行加密，再外包给云服务器。为支持加密云数据高效隐私的密文查询，提出了一种基于访问记录的密文排序函数，以过去推测现在，提高数据查询准确性。其查询准确率的提高在实验中得到了验证。
英文摘要：
In cloud computing, data encryption makes data querying a challenging task. To improve the security of the data and the accuracy of the querying and overcome some weaknesses of the existing encryption algorithm itself, data fist is splited, then data is transformed, before outsourcing data encryption. A rank function over encrypted data based on access records is pro posed. In fact, this method is that the past speculates now to improve the accuracy of the data querying. The accuracy of query is verified in the experiment. Its efficiency of query accuracy has certain improvement.
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