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With increased cyber attacks over years,information system security assessment becomes more and more important.This paper provides an ontology-based attack model,and then utilizes it to assess the information system security from attack angle.We categorize attacks into a taxonomy suitable for security assessment.The proposed taxonomy consists of five dimensions,which include attack impact,attack vector,attack target,vulnerability and defense.Afterwards we build an ontology according to the taxonomy.In the ontology,attack related concepts included in the five dimensions and relationships between them are formalized and analyzed in detail.We also populate our attack ontology with information from national vulnerability database(NVD)about the vulnerabilities,such as common vulnerabilities and exposures(CVE),common weakness enumeration(CWE),common vulnerability scoring system(CVSS),and common platform enumeration(CPE).Finally we propose an ontology-based framework for security assessment of network and computer systems,and describe the utilization of ontology in the security assessment and the method for evaluating attack efect on the system when it is under attack. 相似文献
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机车、车辆整车称重试验台是为满足各种不同轨距、轴距的4轴、6轴机车,车辆整车出厂型式试验,例行试验称重而研制的测试设备。文章着重介绍该称重试验台的系统组成、设计原理及其计量校准等。 相似文献
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目的 了解西安地区供、受血人群梅毒螺旋体(TP)和人类免疫缺陷病毒(HIV)的感染状况,为进一步制定防控措施、保障临床用血安全提供依据.方法 对2000~2009年西安市西京医院约40万供、受血者TP和HIV抗体的检测结果分别按年份和性别进行统计分析.结果 本地区供血者TP抗体阳性率为0.320 9%,受血者为1.169 0%;供血者HIV抗体阳性率为0.013 8%,受血者为0.023 0%.结论 国家无偿献血政策合理,在本地区实施得力,供血者人群拥有更低的TP和HIV感染率,可有效保障临床用血的安全性. 相似文献
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<正>随着港口体制改革的不断深 化和完善,新一轮的以 “政企分开”为核心内容的港口管理体制改革逐步展开,广州港这一有两千多年历史的大港也面临港口体制的重大变革。 一、广州港基本情况 1.概况 广州港是中国古代著名的“海上丝绸之路”的起点。早在南北朝时期,广州港已成为世界大港,作为中国对外贸易和文化交流的口岸开始繁荣。 相似文献
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