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Numerous practical systems based on network coding have been proposed in recent years demonstrating the wide range of benefits of network coding such as increased throughput, reliability, and energy efficiency. However, network coding systems are inherently vulnerable to a severe attack, known as packet pollution, which presents a key obstacle to the deployment of such systems. Several cryptographic schemes have been proposed to defend against pollution attacks. The authors conduct a detailed analysis and an experimental evaluation in a realistic wireless network coding setting of a set of representative cryptographic defenses against pollution attacks.
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