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2011 IEEE International Conference on Information Theory and Information Security(ICITIS 2011)

作者： Lihua Fang Limin Meng Sijun Luo Zhejiang Provincial Key Lab of Opt. Commun. Tech. Zhejiang University of Tech. Hangzhou China

Real-time streaming media transmission has been used widely in the network monitoring system, and audio- video synchronization is a key issue. Since the use of RTP protocol in data transmission, the synchronization problems can be simplified greatly if the time information in RTP data packets is used effectively. Based on the experience in the Network monitoring system programming, this monitoring system makes full use of the timestamp in the RTP protocol, expounds how to set reference time and the timestamp and how to program the audio-video synchronization.

关键词： Network Monitoring RTP timestamp Audio- Video Synchronizationn

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An Action-based Access Control Model Implementation for MLS Information Systems

An Action-based Access Control Model Implementation for MLS ...

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2012年计算机应用与系统建模国际会议

作者： Li Fenghua Shi Guozhen Zhang Jinghui Li Li Dept. of Electronic Engineering Beijing Electronic Science and Technology Institute School of Computer Science and Technology Xidian University

Environmental states retrieving is the major issue in the implementation of action-based access control model. In this paper, the environmental states retrieving mechanism based on ABAC (Action-Based Access Control) was proposed. Then, the architecture of network location detector was presented, and the method to get the logical address based on DHCP and the method to get the physical address based on SNMP and MIB were introduced. By proposing the item, security association request, and its producing procedure, the trusted software and hardware monitoring mechanism was presented. Finally, the method to obtain the temporal states was described.

关键词： Access Control Action Environmental States timestamp

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