| Titre : | Mobility and Security in OLSR | | Type de document : | thèse | | Auteurs : | Baayer Aziz, Auteur | | Année de publication : | 2013 | | Langues : | Anglais (eng) | | Catégories : | Informatique
| | Mots-clés : | Keywords: MANET Replay Attack Denial-of-Service (DoS) 802.11 MAC layer Network Allocation Vector (NAV) Security Countermeasure routing protocols, MANET performance, mobility metric, node mobility degree, mobility model. | | Index. décimale : | Doct/190 | | Résumé : | Abstract:
Mobile Ad hoc NETworks (MANETs), represent an emerging class of networks in which wireless mobile nodes operate independent of a backbone infrastructure. While hosts in traditional networks often rely on a designated router to forward data, every host in a MANET is required to route and forward data.
The network hosts, such as laptops and personal digital assistants, operate on constrained battery power, and limited CPU and storage capacity. These networks suffer: First from trivial Denial-of-Service (DoS) attacks such as replay attacks that perform attack at anytime and anywhere in the network by interception and retransmission of the valid signed messages. Consequently, the MANET performance is severally degraded by the overhead produced by the redundant valid messages. Second, from the unpredictable changes of topology network and link status due to the free move of mobile nodes in the network. Thus, the performance of a mobile ad hoc network is closely related to the capability of routing protocols to adapt themselves to the mobility caused by mobile nodes and also the capacity of the 802.11 MAC layer to limit replayed messages.
Our first achievement in this thesis is to propose a new approach for quantifying and measuring the mobility in the network in order to enhance the performance of the mobile ad hoc routing protocols. Each mobile node in the network can evaluate its mobility independently of any other node in the network as a link change rate with its neighboring nodes. Furthermore, a compromise must be made between the strength in term of safety and performance of the Protocol. Also, we treat the routing security by proposing a new solution of control messages signing in OLSR Routing Protocol.
Our second achievement in this thesis is to propose a new enhancement of timestamp discrepancy used to validate a signed message and consequently limiting the impact of a replay attack. Our proposed timestamp concept estimates approximately the time where the message is received and validated by the received node. This estimation is based on the existing parameters defined at the 802.11 MAC layer and it independent toward any routing protocols.
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Mobility and Security in OLSR [thèse] / Baayer Aziz, Auteur . - 2013. Langues : Anglais ( eng) | Catégories : | Informatique
| | Mots-clés : | Keywords: MANET Replay Attack Denial-of-Service (DoS) 802.11 MAC layer Network Allocation Vector (NAV) Security Countermeasure routing protocols, MANET performance, mobility metric, node mobility degree, mobility model. | | Index. décimale : | Doct/190 | | Résumé : | Abstract:
Mobile Ad hoc NETworks (MANETs), represent an emerging class of networks in which wireless mobile nodes operate independent of a backbone infrastructure. While hosts in traditional networks often rely on a designated router to forward data, every host in a MANET is required to route and forward data.
The network hosts, such as laptops and personal digital assistants, operate on constrained battery power, and limited CPU and storage capacity. These networks suffer: First from trivial Denial-of-Service (DoS) attacks such as replay attacks that perform attack at anytime and anywhere in the network by interception and retransmission of the valid signed messages. Consequently, the MANET performance is severally degraded by the overhead produced by the redundant valid messages. Second, from the unpredictable changes of topology network and link status due to the free move of mobile nodes in the network. Thus, the performance of a mobile ad hoc network is closely related to the capability of routing protocols to adapt themselves to the mobility caused by mobile nodes and also the capacity of the 802.11 MAC layer to limit replayed messages.
Our first achievement in this thesis is to propose a new approach for quantifying and measuring the mobility in the network in order to enhance the performance of the mobile ad hoc routing protocols. Each mobile node in the network can evaluate its mobility independently of any other node in the network as a link change rate with its neighboring nodes. Furthermore, a compromise must be made between the strength in term of safety and performance of the Protocol. Also, we treat the routing security by proposing a new solution of control messages signing in OLSR Routing Protocol.
Our second achievement in this thesis is to propose a new enhancement of timestamp discrepancy used to validate a signed message and consequently limiting the impact of a replay attack. Our proposed timestamp concept estimates approximately the time where the message is received and validated by the received node. This estimation is based on the existing parameters defined at the 802.11 MAC layer and it independent toward any routing protocols.
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