Because of the nature of wireless channels, Mobile Ad-Hoc Networks (MANETs) are vulnerable against many threats and attacks. Beside of this, the mobility of the network nodes made the security of routing protocols one of the most interesting research areas over Ad-Hoc networks. Moreover, Rushing attack became one of the common attacks against routing protocols in MANETs. Although there are many researches over Rushing attacks, the security research community suffers from a famine of evidence to present the exact position of this kind of attacks in MANETs clearly. Therefore, we paid particular attention to this issue to clarify the position of Rushing attacks against routing protocols and the functionality of this category of attacks. We hope that our document be useful for other researchers in understanding mentioned issue in face with this class of attacks.

Recently, various pairing-based and pairing-free two party Key Agreement protocols in the context of Identity-Based and Certificateless cryptosystems have been published. The pairing-free Key Agreement protocols could improve the efficiency by eliminating the high expense of pairing maps. In this paper, we proposed several secure and efficient Identity-Based and Certificateless pairing-free two party Key Agreement protocols. In compare with related works, our protocols require less computational cost.

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