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An Improved Event Scenario Correlation Method for Multi-Source Security Log
Qianyun Wang,Shuyu Chen,Hancui Zhang,Tianshu Wu 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.2
Developing computer technologies and a network of persistently growing size put massive hosts and transmission devices in a vast network at increasingly higher risks. Log information of various devices can facilitate the detection of intrusion and attacks. Log information from a single data source is, however, with limitations. The analysis results cannot precisely reflect the current network situation if log information in a single data source is analyzed without correlation to analysis of log information from different data sources. To better demonstrate network situation, this paper proposes an improved event scenario correlation method for multi-source log analysis via researching on numerous existing data fusion methods and event correlation methods as well as integration of conventional event scenario correlation (ESC) method with fuzzy reasoning. Experimental results prove that the proposed method significantly reduces the False Positive rate (FP rate) and False Negative rate (FN rate) of security logs.
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A Congestion Control Mechanism for Streaming Media Transmission Over Wireless Environment
Hancui Zhang,Shuyu Chen,Qianyun Wang,Jun Liu 보안공학연구지원센터 2016 International Journal of Multimedia and Ubiquitous Vol.11 No.8
TFRC (TCP-Friendly Rate Control Protocol) has been recognized as a relatively good mechanism for TCP friendly congestion control on cable network. However, TFRC is sensitive to the network status and cannot actually distinguish congestion losses and non-congestion losses well in wireless networks. The high error rates and large delay of wireless networks result in significant performance degradation and poor quality of the streaming media transmission service in transmission. To solve this problem, this paper proposes an Explicit Congestion Notification TCP (ECN-TCP) based TCP Friendly Wireless streaming Media Rate Control (TF-WMRC) congestion control mechanism. This mechanism improves TFRC and conjunctions with ECN and RED (Random Early Detection) methods, differentiating correctly congestion losses and wireless error losses and effectively alleviating the throughput degradation caused by wireless links. Performance evaluation of network efficiency, TCP friendliness and streaming media stability in NS2 simulation platform has shown that it is a good congestion control mechanism for streaming media transmission in wireless environment.
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