Public Key Based Incentive Strategies for Cooperation in MANETs

Cooperation incentive schemes can motivate the Selfish nodes to reach other nodes packets to enhance the performance of multi-hop wireless networks. Secure schemes typically use public key cryptography to traverse various attacks such as payment repudiation and free equitation. However, these cryptosystems undergo too heavy overhead to be used efficiently in the limited-resource nodes. Here, propose a secure cooperation incentive scheme that requires public-key operations only for the first packet in a sequence, and then the efficient hashing operations are used in the following packets, so that the aerial of the packet string converges to that of the hashing operations. Our evaluations express that our scheme is secure and has much less overhead than the signature-based incentive schemes because the efficient hashing operations dominate the nodes operations. Security analysis and performance appraisal demonstrate that the proposed protocol is secure and the overground is incomparable to the publickey based incentive protocols because the efficient hashing operations dominate the nodes operations. Moreover, the average packet overground is less than that of the public-key based protocols with very high prospect due to truncating the keyed hash values.