组播技术是一种新的、高效的网络传输机制。它提供了一种一到多或者多到多的通信策略,能够有效地节约网络带宽、降低网络负载,所以在实时数据传送、多媒体会议、网络游戏等诸多方面都有广泛的应用。但是安全问题却阻碍了组播技术的进一...组播技术是一种新的、高效的网络传输机制。它提供了一种一到多或者多到多的通信策略,能够有效地节约网络带宽、降低网络负载,所以在实时数据传送、多媒体会议、网络游戏等诸多方面都有广泛的应用。但是安全问题却阻碍了组播技术的进一步应用。虽然单播的安全问题己经得到较好的解决,但是由于组播体系结构比单播更加复杂,因此组播通信安全仍然存在很多问题值得进一步研究。本文重点研究Internet组管理协议(Internet Group Management Protocol,简称IGMP)的原理和扩展性,首先列举了一些现有的组成员的认证技术并着重分析了Kerberos认证协议,然后分析了现有的Internet组管理协议的三个版本,最后利用组管理协议的第三版(IGMPv3)的扩展性提出了K认证组管理协议(Kerberos Authenticate Internet Group Management Protocol,简称KIGMP),在组管理的同时完成认证功能。展开更多
An improved internetworking approach is proposed to enhance the Internet connectivity which is deteriorated due to unidirectional links and blind rebroadcasting of gateway discovery packets for mobile ad hoc networks....An improved internetworking approach is proposed to enhance the Internet connectivity which is deteriorated due to unidirectional links and blind rebroadcasting of gateway discovery packets for mobile ad hoc networks. The hybrid gateway discovery scheme that combined the advantages of a proactive and reactive gateway discovery approach is used to achieve high connectivity while keeping overhead costs low. By exchanging ad hoc on-demand distance vector (AODV) hello packet which includes additional fields named symmetric neighbor list and asymmetric neighbor list, unidirectional links are removed from route computation and broadcast storm can also be relieved simultaneously. Performance results using ns-2 simulations, under varying numbers of unidirectional links and node speeds, show that this improved Internet connectivity approach can provide better performance than others.展开更多
SCI(Systemics,Cybernetics,Informatics)2003国际学术会议于2002年7月27~30日在美国弗罗里达州奥兰多市召开,由信息与系统国际研究院(IIIS-International Institute of Informatics and Sy-stemics)、系统研究国际联合会(IFSR-Interna...SCI(Systemics,Cybernetics,Informatics)2003国际学术会议于2002年7月27~30日在美国弗罗里达州奥兰多市召开,由信息与系统国际研究院(IIIS-International Institute of Informatics and Sy-stemics)、系统研究国际联合会(IFSR-InternationalFederation of System Research)联合主办,是一次大型综合性国际学术会议。会议的宗旨是:①探讨系统学、控制学和信息学之间的关联性及其社会效益和应用问题;②鼓励和促进交叉学科的理论研究和应用研究;③建立不同学术领域之间的联系渠道;④提供大学、研究机构、商业机构之间在不同层次、不同领域的联系。展开更多
文摘组播技术是一种新的、高效的网络传输机制。它提供了一种一到多或者多到多的通信策略,能够有效地节约网络带宽、降低网络负载,所以在实时数据传送、多媒体会议、网络游戏等诸多方面都有广泛的应用。但是安全问题却阻碍了组播技术的进一步应用。虽然单播的安全问题己经得到较好的解决,但是由于组播体系结构比单播更加复杂,因此组播通信安全仍然存在很多问题值得进一步研究。本文重点研究Internet组管理协议(Internet Group Management Protocol,简称IGMP)的原理和扩展性,首先列举了一些现有的组成员的认证技术并着重分析了Kerberos认证协议,然后分析了现有的Internet组管理协议的三个版本,最后利用组管理协议的第三版(IGMPv3)的扩展性提出了K认证组管理协议(Kerberos Authenticate Internet Group Management Protocol,简称KIGMP),在组管理的同时完成认证功能。
基金The National Natural Science Foundation of China(No60362001)
文摘An improved internetworking approach is proposed to enhance the Internet connectivity which is deteriorated due to unidirectional links and blind rebroadcasting of gateway discovery packets for mobile ad hoc networks. The hybrid gateway discovery scheme that combined the advantages of a proactive and reactive gateway discovery approach is used to achieve high connectivity while keeping overhead costs low. By exchanging ad hoc on-demand distance vector (AODV) hello packet which includes additional fields named symmetric neighbor list and asymmetric neighbor list, unidirectional links are removed from route computation and broadcast storm can also be relieved simultaneously. Performance results using ns-2 simulations, under varying numbers of unidirectional links and node speeds, show that this improved Internet connectivity approach can provide better performance than others.
文摘SCI(Systemics,Cybernetics,Informatics)2003国际学术会议于2002年7月27~30日在美国弗罗里达州奥兰多市召开,由信息与系统国际研究院(IIIS-International Institute of Informatics and Sy-stemics)、系统研究国际联合会(IFSR-InternationalFederation of System Research)联合主办,是一次大型综合性国际学术会议。会议的宗旨是:①探讨系统学、控制学和信息学之间的关联性及其社会效益和应用问题;②鼓励和促进交叉学科的理论研究和应用研究;③建立不同学术领域之间的联系渠道;④提供大学、研究机构、商业机构之间在不同层次、不同领域的联系。