权限管理问题一直是计算机系统安全研究和应用的热点之一。
Privilege management is always an important problem of computer system security researches and applications.
因此对TETRA数字集群系统安全技术的研究非常关键。
Therefore, we study the security of the TETRA system is very critical.
可靠性问题在电力系统安全体系研究中是一个非常重要方面。
Reliability problem is a very importance aspect on power system safe system research.
第三部分研究设计了陕鼓信息系统安全技术方案。
The third part has researched and designed the Shaangu information system safety technology programs.
第四部分研究了陕鼓信息系统安全管理制度。
The fourth part has studied the Shaangu information system safety control system.
为了提高系统安全性，研究了数据保密技术。
In order to improve the security of system, data security technology is also researched.
采用个案研究法对信息系统安全需求进行分析。
Used the case methodology to carry on the analysis to the information system security requirements.
采用个案研究法对信息系统安全需求进行分析。
Used the case methodology to carry on the analysis to the information system security requirements.
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