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Previous simulations have shown substantial performance gains can be achieved by using hybrid cellular and Wireless LAN (WLAN) approaches. In a hybrid system, a proxy in an area of strong connectivity (And therefore higher bandwidth) forwards traffic on behalf of a client in an area of weaker connectivity (And therefore lower bandwidth). The proxy routes traffic between the base station (Over a cellular link) and the client (Over a WLAN). Such approaches have had limited practical applicability due to substantial security risks, including eavesdropping, intentional performance degradation and cheating the incentive schemes. The Secure Unified Cellular Ad Hoc Network (SUCAN) protocol is designed to address these risks, allowing the deployment of hybrid networks.
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