Engine engineering database system is an oriented C AD applied database management system that has the capability managing distributed data. The paper discusses the security issue of the engine engineering database ma...Engine engineering database system is an oriented C AD applied database management system that has the capability managing distributed data. The paper discusses the security issue of the engine engineering database management system (EDBMS). Through studying and analyzing the database security, to draw a series of securi ty rules, which reach B1, level security standard. Which includes discretionary access control (DAC), mandatory access control (MAC) and audit. The EDBMS implem ents functions of DAC, MAC and multigranularity audit. DAC solves the problems o f role inheritance, right contain, authorization identify and cascade revoke, et c; MAC includes subject and object security setup rule, security modify rule and multilevel relation access operation rule, etc; Audit allows making the sub ject, object or operation type as different audit object to implement flexible a nd multigranularity audit method. The model is designed act as a security agent to access daemon database. At present, the model is implemented which runs on th e Windows 2000 environments.展开更多
China’s social safety net extends to unemployed city residents With an aging population of moret han 100 million presenting unforeseen obstacles to ensure benefits for retirees,China recently implemented new measures...China’s social safety net extends to unemployed city residents With an aging population of moret han 100 million presenting unforeseen obstacles to ensure benefits for retirees,China recently implemented new measures to cover the last social group in its extensive pension system:unemployed city residents.The pilot pension program for unemployed urban residents,the State Council’s most recent initiative to improve the coun-展开更多
文摘Engine engineering database system is an oriented C AD applied database management system that has the capability managing distributed data. The paper discusses the security issue of the engine engineering database management system (EDBMS). Through studying and analyzing the database security, to draw a series of securi ty rules, which reach B1, level security standard. Which includes discretionary access control (DAC), mandatory access control (MAC) and audit. The EDBMS implem ents functions of DAC, MAC and multigranularity audit. DAC solves the problems o f role inheritance, right contain, authorization identify and cascade revoke, et c; MAC includes subject and object security setup rule, security modify rule and multilevel relation access operation rule, etc; Audit allows making the sub ject, object or operation type as different audit object to implement flexible a nd multigranularity audit method. The model is designed act as a security agent to access daemon database. At present, the model is implemented which runs on th e Windows 2000 environments.
文摘China’s social safety net extends to unemployed city residents With an aging population of moret han 100 million presenting unforeseen obstacles to ensure benefits for retirees,China recently implemented new measures to cover the last social group in its extensive pension system:unemployed city residents.The pilot pension program for unemployed urban residents,the State Council’s most recent initiative to improve the coun-
