Secure Outsourcing Database in cloud computing environment

提出并实现了一种新的安全查询处理方法，在云计算环境下数据存储在数据库系统中的情况下，不窃取数据库管理员的敏感数据。特别是我们提出的ShuffledBF，它可以隐藏表的模式信息，并保留了对手根据每个属性值的分布进行推理的能力。此外，为了提高查询响应速度，我们还研究了以下两个方面的改进：(1)对BloomFilter索引进行了置乱处理；(2)提出了由置乱BloomFilter和非置乱BloomFilter组成的半置乱BF。

We proposed and implemented a new secure query processing methodology which don't steal sensitive data from the database administrator, in the case the data is stored in the database system on cloud computing environment. Especially, our proposed ShuffledBF, which can hide the schema information of the table, and it preserves the adversaries' inferring from the distribution of each attribute value. In addition, we investigated the following two improvements for speed up the query response time ; (1) the perturbation of bloomfilter index withou shuffling (2) proposing Semi-ShuffledBF which is marged a shuffled bloomfilter and a non-shuffled bloomfilter.