In ACM'CCS 2009,Camenisch,et al.proposed the Oblivious Transfer with Access Control(AC-OT) in which each item is associated with an attribute set and can only be available,on request,to the users who have all the ...In ACM'CCS 2009,Camenisch,et al.proposed the Oblivious Transfer with Access Control(AC-OT) in which each item is associated with an attribute set and can only be available,on request,to the users who have all the attributes in the associated set.Namely,AC-OT achieves access control policy for conjunction of attributes.Essentially,the functionality of AC-OT is equivalent to the sim-plified version that we call AC-OT-SV:for each item,one attribute is associated with it,and it is requested that only the users who possess the associated attribute can obtain the item by queries.On one hand,AC-OT-SV is a special case of AC-OT when there is just one associated attribute with each item.On the other hand,any AC-OT can be realized by an AC-OT-SV.In this paper,we first present a concrete AC-OT-SV protocol which is proved to be secure in the model defined by Camenisch,et al..Then from the protocol,interestingly,a concrete Identity-Based Encryption(IBE) with Anonymous Key Issuing(AKI) is given which is just a direct application to AC-OT-SV.By comparison,we show that the AKI protocol we present is more efficient in communications than that proposed by Chow.展开更多
随着数据中心的快速发展,不间断电源(Uninterruptible Power Supply,UPS)交流电源作为保障数据中心稳定供电的关键设备,其接入方案的选择变得至关重要。探讨了数据中心UPS交流电源的接入方案,重点考虑了数据中心运行环境要求和方案设计...随着数据中心的快速发展,不间断电源(Uninterruptible Power Supply,UPS)交流电源作为保障数据中心稳定供电的关键设备,其接入方案的选择变得至关重要。探讨了数据中心UPS交流电源的接入方案,重点考虑了数据中心运行环境要求和方案设计的因素。首先,介绍了UPS交流电源的概述和特性;其次,分析了数据中心对UPS交流电源的要求,在接入方案的考虑因素中,着重考虑了数据中心的运行环境要求以及方案设计中的UPS电源容量选择计算和蓄电池配置计算;最后,提出了合理的方案电气原理。通过研究和分析,可以为数据中心UPS交流电源的接入提供有益的参考和指导,确保数据中心的稳定供电和运行安全。展开更多
文摘In ACM'CCS 2009,Camenisch,et al.proposed the Oblivious Transfer with Access Control(AC-OT) in which each item is associated with an attribute set and can only be available,on request,to the users who have all the attributes in the associated set.Namely,AC-OT achieves access control policy for conjunction of attributes.Essentially,the functionality of AC-OT is equivalent to the sim-plified version that we call AC-OT-SV:for each item,one attribute is associated with it,and it is requested that only the users who possess the associated attribute can obtain the item by queries.On one hand,AC-OT-SV is a special case of AC-OT when there is just one associated attribute with each item.On the other hand,any AC-OT can be realized by an AC-OT-SV.In this paper,we first present a concrete AC-OT-SV protocol which is proved to be secure in the model defined by Camenisch,et al..Then from the protocol,interestingly,a concrete Identity-Based Encryption(IBE) with Anonymous Key Issuing(AKI) is given which is just a direct application to AC-OT-SV.By comparison,we show that the AKI protocol we present is more efficient in communications than that proposed by Chow.
文摘随着数据中心的快速发展,不间断电源(Uninterruptible Power Supply,UPS)交流电源作为保障数据中心稳定供电的关键设备,其接入方案的选择变得至关重要。探讨了数据中心UPS交流电源的接入方案,重点考虑了数据中心运行环境要求和方案设计的因素。首先,介绍了UPS交流电源的概述和特性;其次,分析了数据中心对UPS交流电源的要求,在接入方案的考虑因素中,着重考虑了数据中心的运行环境要求以及方案设计中的UPS电源容量选择计算和蓄电池配置计算;最后,提出了合理的方案电气原理。通过研究和分析,可以为数据中心UPS交流电源的接入提供有益的参考和指导,确保数据中心的稳定供电和运行安全。
