Research On Security Strategy Based On Ad Hoc Network

Mobile Ad hoc Network(MANET)is a peer-to-peer network composed of multiple ad hoc devices.It has the characteristics of flexible deployment and strong robustness.With the development of integrated circuit and Wi-Fi technology,MANET has gradually become a research hotspot,and a large number of universally recognized ad hoc network protocols have been proposed.However,in common MANET,attackers can often paralyze the network by violating the protocol.To solve the problem,two security strategies were proposed.The main research works are as follows:1.Based on the analysis of the BATMAN.adv protocol,a network operating model of the protocol is proposed.Then,the principle of the attack is pointed out.After thoroughly consider the security issues of the network under the two conditions of key security and key leakage,a network security model is proposed.2.Aiming at the problem that the protocol is vulnerable to attacks,a security strategy based on neighbor node identity authentication is proposed.The strategy ensures MANET security under the condition that keys are secure.Four versions of the security strategy are realized by combining the four encryption algorithms of AES,SHA-2,RSA and ECC respectively.These security strategies were applied to BATMAN.adv and tested on the embedded platform.After testing,the results show that networks with security strategy avoid black hole attacks,and the increase in node resource consumption is not obvious.3.Leaking the keys of some nodes will cause security risks to the entire network.Aiming at this problem,an OGM packet feature consensus is proposed.In order to ensure the effectiveness of this consensus mechanism,a security strategy based on one-way sequence is proposed.This strategy is implemented based on the fixed size collision free hash function and digital signature in cryptography.This strategy can guarantee the security of MANET to the greatest extent under the condition of key leakage.The difference in security between strategies based on different encryption algorithms is obtained by mathematical derivation.After applying this strategy to BATMAN.adv network and testing it on embedded platform,the results show that this security strategy avoids black hole attacks and is suitable for embedded platforms.