Research And Simulation Of Anti Wiretapping And Replay Attack Algorithm For Wireless Networks

With the widespread use of communication in the field of wireless communication technology, with its unique superiority, wireless network has gradually become the important direction of the development of the communications industry today.With the rapid development of wireless network, however, because of the existing security system for deployment of high-level security mechanism, lead to wireless communication security is a serious threat.As a result, the communication security problem gradually become one of the research focus in the field of wireless communications.In order to solve the problem of communication system of eavesdropping, by adopting the technology of the physical layer, the proposed collaborative communication disables algorithm based on reputation.As a simple amplifier forward let untrusted node, as a trusted node node collaboration interference.Interference node interference and external eavesdropping untrusted node of information received.And at the destination node, reliable relay node sent two noise cancel each other out, implements the secure communication.And put forward a multi-antenna transmission channel based algorithm to achieve the physical prevent eavesdropping.Multi-antenna technology can choose according to the characteristics of different channel adaptive transmission channel, so that each of the antennas transmit signals in legal receive correct to overlay its strongest signal strength, and in the other nodes signal offset each other, as well as lower ber legal node increases the hacking node degree of difficulty of intercept the message.Using MATLAB simulation software for simulation algorithm.The simulation results show that the proposed algorithm can reduce eavesdropping intercept probability, the sender is equipped with the more the number of antenna interception rate is lower.In wireless networks, using SCPS agreement system, network information security service is mainly focused on SCPS-SP security protocol layer protocol.Combining with the characteristics of SCPS-SP agreement and a part of the serial mechanism is presented.Innovative use of part of the serial mechanism to guarantee the freshness of data, and according to the state of the communication, dynamic adjustment to send digital serial number.This mechanism can not only guarantee the freshness of data, at the same time also can ensure the SCPS agreement optimal bits consumption- SP, and availability for the perfection of the whole security protocols play a huge role.The algorithm is simulated with MATLAB and NS2 simulation software. Simulation results show that our method can work better.