In sensor networks,the adversaries can inject false data reports from compromised nodes.Previous approaches to filter false reports,e.g.,SEF,only verify the correctness of the message authentication code (MACs) carrie...In sensor networks,the adversaries can inject false data reports from compromised nodes.Previous approaches to filter false reports,e.g.,SEF,only verify the correctness of the message authentication code (MACs) carried in each data report on intermediate nodes,thus cannot filter out fake reports that are forged in a collaborative manner by a group of compromised nodes,even if these compromised nodes distribute in different geographical areas.Furthermore,if the adversary obtains keys from enough (e.g.,more than t in SEF) distinct key partitions,it then can successfully forge a data report without being detected en-route.A neighbor information based false report filtering scheme (NFFS) in wireless sensor networks was presented.In NFFS,each node distributes its neighbor information to some other nodes after deployment.When a report is generated for an observed event,it must carry the IDs and the MACs from t detecting nodes.Each forwarding node checks not only the correctness of the MACs carried in the report,but also the legitimacy of the relative position of these detecting nodes.Analysis and simulation results demonstrate that NFFS can resist collaborative false data injection attacks efficiently,and thus can tolerate much more compromised nodes than existing schemes.展开更多
Management has addressed the critical issue of environmental protection by developing environmental management systems. The purpose of this research is to describe the organizational structure for environmental protec...Management has addressed the critical issue of environmental protection by developing environmental management systems. The purpose of this research is to describe the organizational structure for environmental protection, an attribute of environmental management systems of privately held companies, certified with MS ISO 14001. Descriptive statistics are reported for the primary data. The commonly reported attributes provide evidence of high-level commitment to environmental protection： written environmental policy statement, corporate-level environmental management function, and Board of Directors＇ responsibility for oversight of environmental affairs. Findings indicate that companies have educational programs and environmental goals to disseminate environmental management values throughout their organizations.展开更多
基金Projects(61173169,61103203,70921001)supported by the National Natural Science Foundation of ChinaProject(NCET-10-0798)supported by Program for New Century Excellent Talents in University of China
文摘In sensor networks,the adversaries can inject false data reports from compromised nodes.Previous approaches to filter false reports,e.g.,SEF,only verify the correctness of the message authentication code (MACs) carried in each data report on intermediate nodes,thus cannot filter out fake reports that are forged in a collaborative manner by a group of compromised nodes,even if these compromised nodes distribute in different geographical areas.Furthermore,if the adversary obtains keys from enough (e.g.,more than t in SEF) distinct key partitions,it then can successfully forge a data report without being detected en-route.A neighbor information based false report filtering scheme (NFFS) in wireless sensor networks was presented.In NFFS,each node distributes its neighbor information to some other nodes after deployment.When a report is generated for an observed event,it must carry the IDs and the MACs from t detecting nodes.Each forwarding node checks not only the correctness of the MACs carried in the report,but also the legitimacy of the relative position of these detecting nodes.Analysis and simulation results demonstrate that NFFS can resist collaborative false data injection attacks efficiently,and thus can tolerate much more compromised nodes than existing schemes.
文摘Management has addressed the critical issue of environmental protection by developing environmental management systems. The purpose of this research is to describe the organizational structure for environmental protection, an attribute of environmental management systems of privately held companies, certified with MS ISO 14001. Descriptive statistics are reported for the primary data. The commonly reported attributes provide evidence of high-level commitment to environmental protection： written environmental policy statement, corporate-level environmental management function, and Board of Directors＇ responsibility for oversight of environmental affairs. Findings indicate that companies have educational programs and environmental goals to disseminate environmental management values throughout their organizations.
