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The variety and complexity of cyber attacks is increasing. The attackers have a strong economic and political motivation thus leading to organized and targeted attacks. We have concluded that intrusions are inevitable, and have focused on strategies to work through the attack while limiting the losses. Our approach, called Self Cleansing Intrusion Tolerance (SCIT), leads to the next generation of secure servers. SCIT shifts the focus from intrusion avoidance to reducing the losses resulting from an intrusion. This additional layer of defense is justified, because the current reactive approaches cannot keep up with the rapidly increasing new threats.