在数据库系统中,数据访问技术从连接模型发展到断开连接模型。断开连接访问模型技术自身的优点为有别于传统严格一致的可串行化并发控制协议提供了必要性和可能性。通过剖析断开连接数据访问模型ADO.NET基础上,提出了一种基于时间戳验...在数据库系统中,数据访问技术从连接模型发展到断开连接模型。断开连接访问模型技术自身的优点为有别于传统严格一致的可串行化并发控制协议提供了必要性和可能性。通过剖析断开连接数据访问模型ADO.NET基础上,提出了一种基于时间戳验证的两阶段封锁多版本并发控制协议。该协议解决了在断开连接访问模型下网络数据库系统的并发访问异常,保证了数据的一致性,提高了系统的性能和并发度。最后在.NET框架和Microsoft SQL Server 2000下实现该协议。展开更多
The trusted network connection is a hot spot in trusted computing field and the trust measurement and access control technology are used to deal with network security threats in trusted network.But the trusted network...The trusted network connection is a hot spot in trusted computing field and the trust measurement and access control technology are used to deal with network security threats in trusted network.But the trusted network connection lacks fine-grained states and real-time measurement support for the client and the authentication mechanism is difficult to apply in the trusted network connection,it is easy to cause the loss of identity privacy.In order to solve the abovedescribed problems,this paper presents a trust measurement scheme suitable for clients in the trusted network,the scheme integrates the following attributes such as authentication mechanism,state measurement,and real-time state measurement and so on,and based on the authentication mechanism and the initial state measurement,the scheme uses the realtime state measurement as the core method to complete the trust measurement for the client.This scheme presented in this paper supports both static and dynamic measurements.Overall,the characteristics of this scheme such as fine granularity,dynamic,real-time state measurement make it possible to make more fine-grained security policy and therefore it overcomes inadequacies existing in the current trusted network connection.展开更多
文摘在数据库系统中,数据访问技术从连接模型发展到断开连接模型。断开连接访问模型技术自身的优点为有别于传统严格一致的可串行化并发控制协议提供了必要性和可能性。通过剖析断开连接数据访问模型ADO.NET基础上,提出了一种基于时间戳验证的两阶段封锁多版本并发控制协议。该协议解决了在断开连接访问模型下网络数据库系统的并发访问异常,保证了数据的一致性,提高了系统的性能和并发度。最后在.NET框架和Microsoft SQL Server 2000下实现该协议。
基金ACKNOWLEDGMENT This work was supported by the National Basic Research Program of China （973 Project） （NO.2007CB311100）, the National Science Foundation for Young Scholars of China （Grant No.61001091）, Beijing Nature Science Foundation（No. 4122012）, ＂next-generation broadband wireless mobile communication network＂ National Science and Technology major Special issue funding（No. 2012ZX03002003）, Funding Program for Academic Human Resources Development in Institutions of Higher Learning Under the Jurisdiction of Beijing Municipality of China and the key technology research and validation issue for the emergency treatment telemedicine public service platform which integrates the military and civilian and bases on the broadband wireless networks（No.2013ZX03006001-005）, the issue belongs to Major national science and technology projects.
文摘The trusted network connection is a hot spot in trusted computing field and the trust measurement and access control technology are used to deal with network security threats in trusted network.But the trusted network connection lacks fine-grained states and real-time measurement support for the client and the authentication mechanism is difficult to apply in the trusted network connection,it is easy to cause the loss of identity privacy.In order to solve the abovedescribed problems,this paper presents a trust measurement scheme suitable for clients in the trusted network,the scheme integrates the following attributes such as authentication mechanism,state measurement,and real-time state measurement and so on,and based on the authentication mechanism and the initial state measurement,the scheme uses the realtime state measurement as the core method to complete the trust measurement for the client.This scheme presented in this paper supports both static and dynamic measurements.Overall,the characteristics of this scheme such as fine granularity,dynamic,real-time state measurement make it possible to make more fine-grained security policy and therefore it overcomes inadequacies existing in the current trusted network connection.
