一种通用可组合安全的快速密钥交换协议

针对快速密钥交换协议JFKi信息冗余及缺乏形式化证明的问题,提出一种轻量级快速密钥交互协议LJFKi。通过对比分析,发现所提协议的消息长度较原有协议减少1/3,具有较高的通信效率,更适用于对通信负载比较敏感的网络。利用通用可组合安全模型证明该协议能够实现安全会话理想函数,具有通用可组合安全性。     

一种基于软件定义网络的自治服务质量管理机制(英文)

With the increase of network complexity,the flexibility of network control and management becomes a nontrivial problem.Both Software Defined Network(SDN) and Autonomic Network technologies are sophisticated technologies for the network control and management.These two technologies could be combined together to construct a software defined self-managing solution for the future network.An autonomic QoS management mechanism in Software Defined Network(AQSDN) is proposed in this paper.In AQSDN,the various QoS features can be configured autonomically in an OpenFlow switch through extending the OpenFlow and OF-Config protocols.Based on AQSDN,a novel packet context-aware QoS model(PCaQoS) is also introduced for improving the network QoS.PCaQoS takes packet context into account when packet is marked and managed into forwarding queues.The implementation of a video application's prototype which evaluates the self-configuration feature of the AQSDN and the enhancement ability of the PCaQoS is presented in order to validate this design.     

通用可组合安全的WLAN密钥交换协议*

安全性是WLAN应用的核心问题,IEEE 802.11i定义了WLAN安全基础框架,其中,四次握手协议4-WAY实现会话密钥交换与更新。分析表明4-WAY易遭受拒绝服务攻击,提出了一种改进会话密钥协商协议3-WAY, 分析表明该协议具有更好的消息认证和完整性保护,以及高效性。采用通用可组合安全模型对3-WAY进行分析,证明该协议能够实现密钥交换理想函数,具有通用可组合安全性。该协议具有广泛适用性。     

基于时空联合的规则放置方法

针对联合采用超时机制和通配符匹配机制的规则放置问题,提出了基于时空联合的规则放置算法TSRPM,综合考虑了规则在流表中的逗留时间和规则的匹配空间,以确定规则的放置方案.实验结果表明,所提算法产生的规则放置方案能够有效提高规则命中率,降低分组拒绝率.