Besides, the paper makes a qualitative research on the characters of data security and database security in DSU system. And the emphasis is that how the construction of DSU represent the demand of data security.

• 此外,论文还对DSU中的数据安全以及数据库安全性特点进行了的定性研究,并重点分析了DSU的结构是如何体现数据安全性要求的。