Mobile Ad Hoc Networks (MANETs) is a growing technology which magnetizes many useful applications because nodes can communicate with each other and join and leave network without any predetermined network infrastructure. This behavior of MANETs makes it vulnerable to various different types of attack, so security solutions must be implemented for such environment. Developing adequate countermeasures requires understanding and classification of these attacks.In this paper a comprehensive survey of MANET attacks is performed, and a new classification scheme that is based on the security service targeted by the attack, namely, confidentiality, integrity and availability is proposed. This new classification will provide a better understanding to MANETs attacks that can aid in developing a security service oriented detection and prevention techniques.
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