Abstract:

Because WLAN mainly uses electromagnetic wave as the carrier of information transmission, information can be easily eavesdropped and interfered in the transmission process. Therefore, the secure transmission of data in WLAN has become an urgent problem to be solved in the network era. The encryption system of WLAN is not perfect enough, and there are still some deficiencies in secrecy. On the basis of encryption system of WLAN, this paper uses the asymmetric encryption algorithm RSA and the symmetric encryption algorithm AES to encrypt the message, and uses the secure hash algorithm SHA to calculate the hash value as the digital signature, which ensure the confidentiality, integrity and non-repudiation of the transmitted data. This paper also uses Java programming for point-to-point socket communication, and several tests are carried out in the laboratory LAN to verify the security and feasibility of the scheme.

Key words: RSA, AES, SHA, socket communication