Security challenges in mobile ad hoc networks:a survey <s> Security in QOS: <s> Mobile ad hoc networks (MANETS) are self-created and self organized by a collection of mobile nodes, interconnected by multi-hop wireless paths in a strictly peer to peer fashion. In MANETS the link bandwidth is limited and to provide Quality of Service (QoS) in term of bandwidth, security for soft real time processing services is very difficult. In this paper, we propose a secure QoS enabled on-demand link-state multipath routing mechanism that reactively collect link-state information from source to destination in order to dynamically construct a flow network, then the QoS enabled multipath routes between source & destination are detected by destination node under the CDMA-over-TDMA channel model of MAC layer, which collectively satisfy required bandwidth and security services during route discovery process ( node authentication, secure route establishment, secure data communication). Our mechanism uses symmetric key cryptography and a one-way HMAC based key chain for broadcast node authentication (i.e.TESLA), so that any altering of route discovery packet (i.e. Qo.S route request (QRREQ) packet and QoS route reply (QRREP) is immediately detected).The proposed mechanism has better call acceptance rate in ad hoc wireless networks, where finding a single path satisfying all the QoS requirements is very difficult. <s> BIB001 </s> Security challenges in mobile ad hoc networks:a survey <s> Security in QOS: <s> Cooperative communication has been considered as a promising technique to improve communication quality of service (QoS) in wireless networks, including mobile ad hoc networks (MANETs). Due to their unorganized and decentralized infrastructure, cooperative MANETs (CO-MANETs) are vulnerable to attacks initiated on relays. Although encryption and authentication protocols may prevent compromised data transmission when a selected relay is attacked, their cost is high. In this paper, we propose a game-theoretic approach to quantitatively analyze the attack strategies of the attacker so as to make a rational decision on relay selection and the authentication parameter adaptation to reach a trade-off between security and QoS in CO-MANETs. Simulation results show the effectiveness of the proposed approach for security and QoS co-design in CO-MANETs. <s> BIB002
Using security mechanisms increase packet delivery time and processing time in each node. As a result, security has negative impacts on QOS. Therefore providing QOS beside security in MANET is highly challengeable. Authors in BIB002 presented a game theory to make a trade-off between security and QOS. Authors in BIB001 provided an approach that creates QOS aware multipath between source and destination with link information. By providing security in QOS, a level of security and QOS will be guaranteed with low time or network overhead.