嵌入式浏览器中SSL的设计与实现

针对嵌入式浏览器信息传输的安全性问题和嵌入式软件的特点,介绍了SSL协议,提出了一种在嵌入式浏览器中实现对SSL协议支持的方法.通过分析影响SSL协议客户端性能的因素,对SSL的实现过程进行了适当的优化,使用会话恢复机制、只对服务器进行验证的简单握手模式、减少TCP调用次数和优化对批量数据加密算法等方法,实现了嵌入式浏览器对SSL协议的支持;并介绍了方法在嵌入式浏览器JARI_Browser中的实现过程.实际的应用验证了该方法的可行性和正确性.     

“This program will not be a threat to them”: Ballistic Missile Defense and US relations with Russia and China

Although the Obama Administration has differed from its predecessor in a number of respects, on the specific issue of Ballistic Missile Defense (BMD), there is a striking continuity. The Obama Administration has remained committed to the BMD project, even as it has modified the schedule of deployments and prioritized different systems from the Bush Administration. Significantly, this has led to Chinese and Russian balancing in the nuclear sphere. As a result, there is evidence of a security dilemma-type dynamics in US relations with China and Russia. At present, there is no study that analyzes Russian and Chinese hard internal balancing against the USA in the sphere of missile defense during the Obama Administration. This article fills this gap.     

Pakistan’s nuclear weapons: how safe is safe enough? Transparency versus opacity

Due to expanding and increasing religious extremism and terrorism coupled with political instability in Pakistan, most western observers believe that Pakistan's nuclear weapons are not secure and could be taken over by terrorists. This would have adverse implications for the region and for global peace, especially for the security of USA and Europe. This article argues that this perception is based on a flawed understanding and knowledge of how Pakistan's command and control setup has evolved and operates. Pakistan's nuclear weapons are as safe as any other state's nuclear weapons. Pakistan has also been active in supporting and participating in global efforts to improve nuclear safety and security. Over the years, Pakistan has been quite open in sharing information regarding how it is improving its command and control system with western governments as well as scholars. This article argues that the steps Pakistan has taken to secure its nuclear weapons are adequate and that Pakistan would continue to further strengthen these measures; however, it is the expanding religious extremism, terrorism and anti-Americanism in the country which make the international perception of Pakistan extremely negative and then seep into the perception of Pakistan's nuclear weapons safety and security.     

网络安全实验平台K - 划分映射方法

对网络安全实验平台映射问题进行形式化描述,提出基于K-划分的映射方法,其核心思想是为了尽量减少占用网络资源,尽可能将逻辑拓扑紧密连接的节点映射到同一台交换机上。基于K-划分的映射方法采用贪心法确定初始划分状态,根据评价函数进行节点移动,对生成的子图进行算法迭代,直到所有子图的节点数量不大于物理拓扑端口容量为止。基于K-划分的映射方法弥补了K-L算法中初始划分状态选取的任意性对最终结果产生较大影响的缺陷,实验结果表明该算法的求解时间远小于遗传算法,能在较短的时间内得到映射结果。