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The capability to reliably and accurately identify the attacker has long been believed as one of the most effective deterrents to an attack. Ideally, the attribution of cyber attack should be automated from the attack target all the way toward the attack source on the Internet in real-time. Real-time, network-wide attack attribution, however, is every challenging, and many people have doubted whether...
In this paper, we present a lightweight defense mechanism against VoIP attacks, called VoIP Shield, that can detect counterfeit or MITM modified messages as well as replay attacks without ever changing the underlying VoIP protocol. We then empirically tested our design in conjunction with deployed Vonage VoIP services against a large body of attacks including billing, call redirection, voice pharming,...
While network-wide anomaly analysis has been well studied, the on-line detection of network traffic anomalies at a vantage point inside the Internet still poses quite a challenge to network administrators. In this paper, we develop a behavioral distance based anomaly detection mechanism with the capability of performing on-line traffic analysis. To construct accurate on-line traffic profiles, we introduce...
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