针对传统的IP欺骗攻击缓解方法存在运算开销大、缺乏灵活性等问题,提出了一种基于动态限制策略的软件定义网络(software defined network,SDN)中IP欺骗攻击缓解方法。首先,利用Packet-In消息中三元组信息回溯攻击路径,定位IP欺骗攻击源...针对传统的IP欺骗攻击缓解方法存在运算开销大、缺乏灵活性等问题,提出了一种基于动态限制策略的软件定义网络(software defined network,SDN)中IP欺骗攻击缓解方法。首先,利用Packet-In消息中三元组信息回溯攻击路径,定位IP欺骗攻击源头主机;然后,由控制器制定动态限制策略对连接攻击源头主机的交换机端口的新流转发功能进行限制,待限制期满再恢复其转发新流的功能,限制期的大小随着被检测为攻击源的次数而增长。研究结果表明:这种动态的限制策略可阻隔攻击流进入SDN网络,从而有效避免SDN交换机、控制器以及链路过载;由于在限制期间无需再对这些限制的交换机端口进行实时监测,该方法在应对长时攻击时较传统方法具有更高的缓解效率和更少的资源消耗。展开更多
随着网际互连协议(Internet Protocol,IP)网络在广播电视信号传输中的广泛应用,网络拥塞和信号质量下降等问题日益突出。针对上述挑战,深入分析IP组播、服务质量(Quality of Service,QoS)机制及网络编码等关键技术,在此基础上提出一种...随着网际互连协议(Internet Protocol,IP)网络在广播电视信号传输中的广泛应用,网络拥塞和信号质量下降等问题日益突出。针对上述挑战,深入分析IP组播、服务质量(Quality of Service,QoS)机制及网络编码等关键技术,在此基础上提出一种改进的自适应比特率算法。该算法结合网络状态感知和内容复杂度评估,可实现传输参数的动态调整。通过在模拟网络环境中进行大规模实验,结果表明所提算法在带宽利用率、传输时延及画质方面均有显著提升。此次研究成果为IP网络下广播电视信号的高效传输提供了新的技术方案。展开更多
To meet the demands of high-speed communication under strong electromagnetic interference,an all-light network(ALN)based on a multi-band optical communication system is proposed.It is designed for cross-scenario inter...To meet the demands of high-speed communication under strong electromagnetic interference,an all-light network(ALN)based on a multi-band optical communication system is proposed.It is designed for cross-scenario interconnection and networking,covering air,space,land,and sea.The ALN integrates four types of optical links:underwater blue light communication,white light illumination communication,solar-blind deep ultraviolet communication,and long-distance laser communication systems.These links are interconnected via Ethernet switches with the Transmission Control Protocol(TCP).Any ALN node supports both wired and wireless device access.The data transmission performance between network nodes was tested,with a maximum transmission delay of 73.3 ms,a maximum packet loss rate of 6.1%,and a maximum jitter of 15 ms.This comprehensive all-light network with all-scenario coverage lays the foundation for the future development of network technologies and the digital economy.展开更多
Identifying cloud IP usage scenarios is critical for cybersecurity applications,yet existing machine learning methods rely heavily on numerous features,resulting in high complexity and low interpretability.To address ...Identifying cloud IP usage scenarios is critical for cybersecurity applications,yet existing machine learning methods rely heavily on numerous features,resulting in high complexity and low interpretability.To address these issues,this paper proposes an approach to identify cloud IPs from the perspective of network attributes.We employ data mining and crowdsourced collection strategies to gather IP addresses from various usage scenarios,which including cloud IPs and non-cloud IPs.On this basis,we establish a cloud IP identification feature set that includes attributes such as Autonomous System Number(ASN)and organization information.By analyzing the differences in the properties of different IP usage scenarios in the detection results,we can find out the factors that are conducive to cloud IP identification.Experimental evaluation demonstrates that the proposed method achieves a high identification accuracy of 96.67%,surpassing the performance of traditional machine learning models such as CNN,MLP,XGBoost,KNN,SVM,and Decision Tree,whose accuracies range between 81%and 92%.Furthermore,this study reveals that latency and port information exhibit insufficient discrimination power for distinguishing cloud IP from non-cloud IP scenarios,highlighting ASN as a simpler,more interpretable,and resource-efficient criterion.To facilitate reproducible research,datasets and codes are publicly released.展开更多
Founded in 1929 by a group of pioneering Teochew immigrants,Teochew Poit Ip Huay Kuan is now the largest Teochew clan association in Singapore,representing more than 6,000 members.What began as a traditional clan orga...Founded in 1929 by a group of pioneering Teochew immigrants,Teochew Poit Ip Huay Kuan is now the largest Teochew clan association in Singapore,representing more than 6,000 members.What began as a traditional clan organization has transformed into a dynamic international platform that promotes cultural preservation,strengthens business networks,and supports people-to-people diplomacy between Singapore and China.With seven dedicated divisions including cultural education,youth engagement,international affairs,commerce,and public welfare,the association’s mission is to unite Teochew people worldwide,safeguard their heritage,and foster cooperation between Singapore and China.It played a founding role in several major federations including the Malaysian Federation of Teochew Poit It Huay Kuan and the Singapore Federation of Chinese Clan Associations.展开更多
文摘针对传统的IP欺骗攻击缓解方法存在运算开销大、缺乏灵活性等问题,提出了一种基于动态限制策略的软件定义网络(software defined network,SDN)中IP欺骗攻击缓解方法。首先,利用Packet-In消息中三元组信息回溯攻击路径,定位IP欺骗攻击源头主机;然后,由控制器制定动态限制策略对连接攻击源头主机的交换机端口的新流转发功能进行限制,待限制期满再恢复其转发新流的功能,限制期的大小随着被检测为攻击源的次数而增长。研究结果表明:这种动态的限制策略可阻隔攻击流进入SDN网络,从而有效避免SDN交换机、控制器以及链路过载;由于在限制期间无需再对这些限制的交换机端口进行实时监测,该方法在应对长时攻击时较传统方法具有更高的缓解效率和更少的资源消耗。
文摘随着网际互连协议(Internet Protocol,IP)网络在广播电视信号传输中的广泛应用,网络拥塞和信号质量下降等问题日益突出。针对上述挑战,深入分析IP组播、服务质量(Quality of Service,QoS)机制及网络编码等关键技术,在此基础上提出一种改进的自适应比特率算法。该算法结合网络状态感知和内容复杂度评估,可实现传输参数的动态调整。通过在模拟网络环境中进行大规模实验,结果表明所提算法在带宽利用率、传输时延及画质方面均有显著提升。此次研究成果为IP网络下广播电视信号的高效传输提供了新的技术方案。
基金supported by the National Natural Science Foundation of China under Grant No.U21A20495Research and Development Program of China under Grant No.2022YFE0112000Higher Education Discipline Innovation Project under Grant No.D17018。
文摘To meet the demands of high-speed communication under strong electromagnetic interference,an all-light network(ALN)based on a multi-band optical communication system is proposed.It is designed for cross-scenario interconnection and networking,covering air,space,land,and sea.The ALN integrates four types of optical links:underwater blue light communication,white light illumination communication,solar-blind deep ultraviolet communication,and long-distance laser communication systems.These links are interconnected via Ethernet switches with the Transmission Control Protocol(TCP).Any ALN node supports both wired and wireless device access.The data transmission performance between network nodes was tested,with a maximum transmission delay of 73.3 ms,a maximum packet loss rate of 6.1%,and a maximum jitter of 15 ms.This comprehensive all-light network with all-scenario coverage lays the foundation for the future development of network technologies and the digital economy.
基金funded by the Henan Province Science Foundation for Youths No.222300420058Henan Province Science and Technology Research Project No.232102321064+1 种基金Teacher Education Curriculum Reform Research Priority ProjectNo.2023-JSJYZD-011Key Project of Henan Provincial Higher Education Teaching Reform(Graduate Education)No.2023SJGLX062Y.
文摘Identifying cloud IP usage scenarios is critical for cybersecurity applications,yet existing machine learning methods rely heavily on numerous features,resulting in high complexity and low interpretability.To address these issues,this paper proposes an approach to identify cloud IPs from the perspective of network attributes.We employ data mining and crowdsourced collection strategies to gather IP addresses from various usage scenarios,which including cloud IPs and non-cloud IPs.On this basis,we establish a cloud IP identification feature set that includes attributes such as Autonomous System Number(ASN)and organization information.By analyzing the differences in the properties of different IP usage scenarios in the detection results,we can find out the factors that are conducive to cloud IP identification.Experimental evaluation demonstrates that the proposed method achieves a high identification accuracy of 96.67%,surpassing the performance of traditional machine learning models such as CNN,MLP,XGBoost,KNN,SVM,and Decision Tree,whose accuracies range between 81%and 92%.Furthermore,this study reveals that latency and port information exhibit insufficient discrimination power for distinguishing cloud IP from non-cloud IP scenarios,highlighting ASN as a simpler,more interpretable,and resource-efficient criterion.To facilitate reproducible research,datasets and codes are publicly released.
文摘Founded in 1929 by a group of pioneering Teochew immigrants,Teochew Poit Ip Huay Kuan is now the largest Teochew clan association in Singapore,representing more than 6,000 members.What began as a traditional clan organization has transformed into a dynamic international platform that promotes cultural preservation,strengthens business networks,and supports people-to-people diplomacy between Singapore and China.With seven dedicated divisions including cultural education,youth engagement,international affairs,commerce,and public welfare,the association’s mission is to unite Teochew people worldwide,safeguard their heritage,and foster cooperation between Singapore and China.It played a founding role in several major federations including the Malaysian Federation of Teochew Poit It Huay Kuan and the Singapore Federation of Chinese Clan Associations.
