At Black Hat Europe we met Stefano Zanero who talked about anomaly-based unsupervised intrusion detection. In this video he provides an overview of his research into the subject by illustrating how he worked trying to find ways to detect intruders without relying on signatures. To get more information about the subject take a look at his whitepaper and his presentation from Black Hat Europe 2007.
The team running the Perfect Privacy VPN service has discovered a serious vulnerability that affects all VPN providers that offer port forwarding, and which can be exploited to reveal the real IP address of users.
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