Research On Encryption Of Train-ground Information Transmission Between Wireless Block Center And Train

In the process of information transmission between the train and ground device,wireless communication,as a key part,can ensure the safe and efficient transmission of train-ground information.However,the current information encryption scheme between the Radio Block Center and the ground device has problems such as one-way authorization and weak keys,which makes the train-ground information possible to be stolen.To ensure safe operation,based on the correct transmission of train-ground information,research on more efficient encryption schemes has become the focus of research.In view of the research background,we proposes an information encryption transmission scheme based on a hybrid encryption algorithm.In order to prevent the attack of pseudo base stations,a mutual authentication process is added to the train-ground authentication to strengthen the authentication between the train and the ground.At the same time,elliptic curve encryption is introduced during transmission to improve encryption security.We mainly studies the encryption scheme of train-ground information transmission.The main research contents are as follows:(1)Analyze the encrypted communication process of train-ground information,and summarize the factors and challenges that need to be considered in this subject based on the existing domestic and foreign research results related to this subject.According to the analysis results,we will study the subject from three aspects: the train-ground mutual authentication process,the encryption of the plaintext and the key,and the calculation of the message authentication code.(2)For the mutual authentication process,the protocol participants are created on the virtual machine and the session process is described,and the establishment of the train-ground two-way authentication model is completed.Four different environments are proposed for the attack routes that the intruder may use.The attack path verifies the target,and finally completes the legitimacy verification and key negotiation of both parties.The experimental results show that the verification scheme can traverse fewer nodes to complete the two-way authentication process,and can reduce the authentication time compared with the original scheme,which provides a legal basis and shared session key for information transfer.(3)For the plaintext and key,establish a plaintext encryption model firstly,replace the original 3DES algorithm with the AES algorithm,and then use the elliptic curve encryption algorithm encrypts the session key to improve the encryption security level.(4)The message authentication code is calculated by the SHA-256 algorithm based on the hash function,and the integrity of the message is checked.Finally,on the Microsoft visual studio 2013 platform,the simulation of encryption and decryption of fixed-length data,the verification of avalanche effect and the test of execution efficiency are completed,and compared with the original encryption scheme.The results show that the transmission rate of this scheme is about 10% higher than that of the original scheme,and it can meet the avalanche effect and the accuracy of data transmission,and is more suitable for two-way large-capacity information transmission between the vehicle and the ground.