6月7日至9月21日,深思软件加密技术全国巡回交流会在全国巡回举行,将以武汉、福州、大连、成都、杭州、南京、上海、广州、北京等城市覆盖大江南北的软件企业用户。该公司新一代产品精锐 IV 型加密锁,顺应软件网络化、服务化发展趋势,...6月7日至9月21日,深思软件加密技术全国巡回交流会在全国巡回举行,将以武汉、福州、大连、成都、杭州、南京、上海、广州、北京等城市覆盖大江南北的软件企业用户。该公司新一代产品精锐 IV 型加密锁,顺应软件网络化、服务化发展趋势,以版权保护+授权管理为主要特色,突破了传统的仅为用户提供高强度加密(核心为硬件)的单一软件保护模式。最近,2005 SafeNet 软件保护日以“敲开软件加密的神秘之门,护卫软件企业成长”为主题,在全国展开巡回讲座,旨在为广大的中国软件企业提供一次全面了解主流软件加密产品与技术应用的机会。引领软件开发人员敲开加密技术的神秘之门,掌握软件加密的种种技巧,帮助企业获得软件防护技能。6月13日,“竞开协同新纪元——2005点击科技产品暨应用成果发布会”日前在北京举行。展开更多
Software Defined Networking （SDN） is an emerging networking paradigm that assumes a logically centralized control plane separated from the data plane. Despite all its advantages, separating the control and data plan...Software Defined Networking （SDN） is an emerging networking paradigm that assumes a logically centralized control plane separated from the data plane. Despite all its advantages, separating the control and data planes introduces new challenges regarding resilient communications between the two. That is, disconnec- tions between switches and their controllers could result in substantial packet loss and performance degradation. This paper addresses this challenge by studying the issue of control traffic protection in SDNs with arbitrary numbers of controllers. Specifically, we propose a control traffic protection scheme that combines both local rerouting and constrained reverse path forwarding protections, through which switches can locally react to fail- ures and redirect the control traffic using standby backup forwarding options. Our goal is then to find a set of primary routes for control traffic, called protected control network, where as many switches as possible can benefit from the proposed protection scheme. We formulate the protected control network problem, prove its NP-hardness, and develop an algorithm that reconciles proteetability and performance （e.g., switch-to-control latency）. Through extensive simulations based on real topologies, we show that our approach significantly im- proves protectability of control traffic. The results should help further the process of deploying SDN in real-world networks.展开更多
文摘6月7日至9月21日,深思软件加密技术全国巡回交流会在全国巡回举行,将以武汉、福州、大连、成都、杭州、南京、上海、广州、北京等城市覆盖大江南北的软件企业用户。该公司新一代产品精锐 IV 型加密锁,顺应软件网络化、服务化发展趋势,以版权保护+授权管理为主要特色,突破了传统的仅为用户提供高强度加密(核心为硬件)的单一软件保护模式。最近,2005 SafeNet 软件保护日以“敲开软件加密的神秘之门,护卫软件企业成长”为主题,在全国展开巡回讲座,旨在为广大的中国软件企业提供一次全面了解主流软件加密产品与技术应用的机会。引领软件开发人员敲开加密技术的神秘之门,掌握软件加密的种种技巧,帮助企业获得软件防护技能。6月13日,“竞开协同新纪元——2005点击科技产品暨应用成果发布会”日前在北京举行。
基金supported in part by National High-tech R&D Program of China(863 Program)(Grant Nos.2013AA0133012015AA016101)
文摘Software Defined Networking （SDN） is an emerging networking paradigm that assumes a logically centralized control plane separated from the data plane. Despite all its advantages, separating the control and data planes introduces new challenges regarding resilient communications between the two. That is, disconnec- tions between switches and their controllers could result in substantial packet loss and performance degradation. This paper addresses this challenge by studying the issue of control traffic protection in SDNs with arbitrary numbers of controllers. Specifically, we propose a control traffic protection scheme that combines both local rerouting and constrained reverse path forwarding protections, through which switches can locally react to fail- ures and redirect the control traffic using standby backup forwarding options. Our goal is then to find a set of primary routes for control traffic, called protected control network, where as many switches as possible can benefit from the proposed protection scheme. We formulate the protected control network problem, prove its NP-hardness, and develop an algorithm that reconciles proteetability and performance （e.g., switch-to-control latency）. Through extensive simulations based on real topologies, we show that our approach significantly im- proves protectability of control traffic. The results should help further the process of deploying SDN in real-world networks.
