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This paper presents the study and implementation of a reliable transport protocol for wireless multimedia sensor networks. The work was based on an existing transport protocol for sensor networks, the DTSN ("distributed transport for sensor networks") developed at Inesc within projects IST FP6 UbiSec&Sens, EuroFGI and FP7 EuroNF. For multimedia data transport, some structural changes...
P2P live streaming applications are becoming more popular each day. In contrast to the client-server model, the P2P approach overcomes problems such as system scalability and need for powerful resources in a single point. However, P2P networks may suffer from attacks and opportunistic behaviors. In this paper we present a decentralized reputation system to fight attacks in P2P live streaming networks...
Online video social networks provides features that allow users to post a video as a response to a discussion topic. These features open opportunities for users to introduce polluted content into the system. For instance, spammers may post an unrelated video as response to a popular one aiming at increasing the likelihood of the response being viewed by a larger number of users. Moreover, opportunistic...
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