Advanced metering infrastructure( AMI) is a critical part of the smart grid,and ZigBee is playing an increasingly important role in *** cyber security is the prerequisite to ensure the reliable operation of *** guaran...
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Advanced metering infrastructure( AMI) is a critical part of the smart grid,and ZigBee is playing an increasingly important role in *** cyber security is the prerequisite to ensure the reliable operation of *** guarantee the ZigBee communication security in AMI,a key management scheme based on the ellipticcurve cryptosystem( Ecc) is *** to the ways of information transformation in AMI,the scheme is categorized as unicast communication key management process and multicast communication key management *** in the scheme,the selection of ellipticcurve,the calculation of ZigBee node's Ecc public key and private key,the establishment and distribution of the link key in unicast communication,and the establishment and distribution of the network key in multicast communication are *** analysis results show that the proposed key management scheme is secure,and consumes less memory and energy,thus,can meet the demands of communication security of AMI.
Ansel Wong is the quiet man of British black politics, rarely in the limelight and never seeking political office. And yet his career' here - from Black Power firebrand to managing a multimillion budget as head of...
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Ansel Wong is the quiet man of British black politics, rarely in the limelight and never seeking political office. And yet his career' here - from Black Power firebrand to managing a multimillion budget as head of the Greater London council's Ethnic Minority Unit in the 1980s - spells out some of the most important developments in black educational and cultural projects. In this interview, he discusses his identification with Pan-Africanism, his involvement in student politics, his role in the establishment of youth projects and supplementary schools in the late 1960s and 1970s, and his involvement in black radical politics in London in the same period, all of which took place against the background of revolutionary ferment in the Third World and the world of ideas, and were not without their own internal class and ethnicconflicts.
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