Design Of Secondary LT Code Information Security Transmission Based On The Symbols Of Degree 1

With the development of communication technology,wireless communication has become the main communication method of modern communication.In the wireless communication system,communication participants are independent of each other,so that information can be transmitted more efficiently in the channel.However,most of the traditional anti-eavesdropping information transmission methods use a cryptographic key system to encrypt the transmitted information to achieve the purpose of protecting information security.However,if the key is cracked and the information is leaked,it will cause huge losses and bring huge challenges to wireless network security.A large number of studies in recent years have proved that because LT code has the characteristics of random coding,low coding and decoding complexity,and simple structure,it can play a very good advantage in eavesdropping channels.Using LT code as an anti-eavesdropping code can effectively improve wireless The anti-eavesdropping ability of the transmission system.Since the design method of the LT coding matrix is particularly important for the anti-eavesdropping effect of the eavesdropping channel,a good coding matrix can give full play to the advantages of the LT code and improve the anti-eavesdropping ability more effectively.Therefore,this article improves the original LT anti-eavesdropping coding method.An anti-eavesdropping channel coding method based on the degree 1 symbol in the LT code to perform LT coding again is proposed to ensure the safe,effective and reliable transmission of information.First redesign part of the coding matrix of the LT code,rearrange the size of its basis,and perform the second LT coding on the continuity 1 symbol obtained after the arrangement,thereby delaying the appearance time of the degree 1 symbol and the appearance of the utilization degree 1 symbol Time is the characteristic of the start of BP decoding,which achieves the purpose of delaying the start time of decoding.Experimental results show that compared with the original LT anti-eavesdropping encoding method,the proposed secondary LT encoding method based on degree 1 effectively delays the decoding start time of legitimate receivers and eavesdroppers,and effectively reduces the interception efficiency of eavesdroppers.And through the experimental simulation data,it can be known that it is more suitable for long LT coding,and does not generate large decoding overhead,avoiding the waste of channel resources,therefore,the second LT coding information security transmission design method based on degree 1 is used for wireless communication During the transmission,the security of the information in the transmission process can be guaranteed,and the system’s anti-eavesdropping ability can be effectively improved.