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Traditional temporal logic regards protocols as close system to analyze. In order to overcome the shortcoming of traditional temporal logic, an game-based analysis method is inducted. This method is applied to formal analyze a fair contract signing protocol, and then some defects of the protocol are found. An improvement protocol is proposed which fixes the flaw by adding some extra time limit information...
The first and second layer factors of a host risk on the network is designed and a factor system of the network risk evaluation is built in the paper. To achieve the quantitative evaluation for host risk on the network, the improved AHP method is used as well as experiment is carried out. Finally, it indicates that this approach is able to quantitatively show the host risk on the network.
The development of assessment management system has been discussed for a long time. The motivation always focuses on the evaluation of learners' ability or on the difficulties of examination. The common examination content could be composed by text or simple figures, and the assistant functionalities could also be developed to meet the individual needs. But these functionalities couldn't interoperate...
The virtual machine system such as Xen provides a security isolation between virtual machines (VM) running on the virtual machine monitor (VMM). With the wide application of the virtualization technology, VMM is expected to not only provide the simple isolation but also provide limited sharing between VMs in a secure manner. In this paper, we present an access control mechanism for the virtual machine...
User authentication is one of the important topics in information security. Traditional strong password schemes could provide with certain degree of security; however, the fact that strong passwords being difficult to memorize often leads their owners to write them down on papers or even save them in a computer file. As a result, security becomes greatly compromised. On the other hand, knowing that...
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