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The authors propose a tiered incentive system called Integrity-Based Queuing (IBQ) for protection against Internet Distributed Denial-of-Service (DDoS) attacks. The authors' proposal can be implemented step-by-step where each integrity improvement brings a direct benefit to the autonomous system making it. IBQ proposes preferential queuing based on integrity: good, bad and middle. Since implementation can rarely be complete or network-wide they provide incremental benefit by prioritizing service for domains with better integrity. They have provided a basic analysis to relate performance to measurable integrity of the client. The authors have designed the architecture for authentication, queuing and defense.
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