为响应全球能源互联网战略,保障大规模风电接入下风水协同安全稳定运行,研究风电水电协同运行(wind power and hydropower coordinated operation,WHCO)对信息通讯技术的需求。结合电网信息通信技术发展现状,提出WHCO信息通信保护专网(i...为响应全球能源互联网战略,保障大规模风电接入下风水协同安全稳定运行,研究风电水电协同运行(wind power and hydropower coordinated operation,WHCO)对信息通讯技术的需求。结合电网信息通信技术发展现状,提出WHCO信息通信保护专网(information and communication protection network,ICPN),搭建ICPN的功能架构,并提出了关键技术。在WHCO调度系统中建立具体的WHCO-ICPN系统,介绍了系统的信息共享、信息通信时延以及安全防御功能。该系统为WHCO的实现提供了测量与控制信息实时传输通道,具有较大的工程应用价值。展开更多
With the rapid development of Virtual Private Network (VPN), many companies and organizations use VPN to implement their private communication. Traditionally, VPN uses security protocols to protect the confidentiality...With the rapid development of Virtual Private Network (VPN), many companies and organizations use VPN to implement their private communication. Traditionally, VPN uses security protocols to protect the confidentiality of data, the message integrity and the endpoint authentication. One core technique of VPN is tunneling, by which clients can access the in- ternal servers traversing VPN. However, the tunneling technique also introduces a concealed security hole. It is possible that if one vicious user can establish tunneling by the VPN server, he can compromise the internal servers behind the VPN server. So this paper presents a novel Application-layer based Centralized Information Access Control (ACIAC) for VPN to solve this problem. To implement an efficient, flexible and multi-decision access control model, we present two key techniques to ACIAC—the centralized management mechanism and the stream-based access control. Firstly, we implement the information center and the constraints/events center for ACIAC. By the two centers, we can provide an abstract access control mechanism, and the material access control can be decided dynamically by the ACIAC’s constraint/event mechanism. Then we logically classify the VPN communication traffic into the access stream and the data stream so that we can tightly couple the features of VPN communication with the access control model. We also provide the design of our ACIAC prototype in this paper.展开更多
This paper puts forward a new conception:model warehouse,analyzes the reason why model warehouse appears and introduces the characteristics and architecture of model warehouse.Last,this paper points out that model war...This paper puts forward a new conception:model warehouse,analyzes the reason why model warehouse appears and introduces the characteristics and architecture of model warehouse.Last,this paper points out that model warehouse is an important part of WebGIS.展开更多
文摘为响应全球能源互联网战略,保障大规模风电接入下风水协同安全稳定运行,研究风电水电协同运行(wind power and hydropower coordinated operation,WHCO)对信息通讯技术的需求。结合电网信息通信技术发展现状,提出WHCO信息通信保护专网(information and communication protection network,ICPN),搭建ICPN的功能架构,并提出了关键技术。在WHCO调度系统中建立具体的WHCO-ICPN系统,介绍了系统的信息共享、信息通信时延以及安全防御功能。该系统为WHCO的实现提供了测量与控制信息实时传输通道,具有较大的工程应用价值。
基金Project (No. 60373088) supported by the National Natural ScienceFoundation of China
文摘With the rapid development of Virtual Private Network (VPN), many companies and organizations use VPN to implement their private communication. Traditionally, VPN uses security protocols to protect the confidentiality of data, the message integrity and the endpoint authentication. One core technique of VPN is tunneling, by which clients can access the in- ternal servers traversing VPN. However, the tunneling technique also introduces a concealed security hole. It is possible that if one vicious user can establish tunneling by the VPN server, he can compromise the internal servers behind the VPN server. So this paper presents a novel Application-layer based Centralized Information Access Control (ACIAC) for VPN to solve this problem. To implement an efficient, flexible and multi-decision access control model, we present two key techniques to ACIAC—the centralized management mechanism and the stream-based access control. Firstly, we implement the information center and the constraints/events center for ACIAC. By the two centers, we can provide an abstract access control mechanism, and the material access control can be decided dynamically by the ACIAC’s constraint/event mechanism. Then we logically classify the VPN communication traffic into the access stream and the data stream so that we can tightly couple the features of VPN communication with the access control model. We also provide the design of our ACIAC prototype in this paper.
文摘This paper puts forward a new conception:model warehouse,analyzes the reason why model warehouse appears and introduces the characteristics and architecture of model warehouse.Last,this paper points out that model warehouse is an important part of WebGIS.
