@MASTERSTHESIS\{IMM2005-03961, author = "S. Song", title = "Dynamic feed-back mechanisms in trust-based {DSR}", year = "2005", school = "Informatics and Mathematical Modelling, Technical University of Denmark, {DTU}", address = "Richard Petersens Plads, Building 321, {DK-}2800 Kgs. Lyngby", type = "", note = "Supervised by Assoc. Prof. Christian D. Jensen", url = "http://www2.compute.dtu.dk/pubdb/pubs/3961-full.html", abstract = "Mobile Ad Hoc Network (MANET) is a collection of wireless mobile nodes that dynamically function as a network without the use of any existing infrastructure and centralized administration. The mobile nodes must cooperate at the routing level in order to forward packets to from source to the destination. Current ad hoc routing protocols such as {DSR} assumes the network is benign and cannot cope with misbehavior, i.e., a misbehavior node may drop packet silently to save battery power, etc. Dynamic feedback mechanism has been recently introduced to mitigate the misbehavior in {MANET}. The idea is to build the trust relationship between the mobile nodes in the {MANET} and select routes based on the formed trust values. {CONFIDANT} is a dynamic feedback mechanism in which mobile nodes monitor the behavior of their neighbors and exchange first hand information about other nodes in the {MANET}. This allows other nodes to change their reputation value accordingly and thus identify the misbehaved nodes. This thesis investigates dynamic feedback mechanisms as security solutions for {MANET,} implements {CONFIDANT} protocol using ns2 as simulation environment, and evaluates the performance of {CONFIDANT} fortified {DSR} in the {MANET} where misbehaved nodes present." }