To ensure data transmission control system security, reliability, the program devoted to the entire system, network data were 128bit RSA public key encryption. RSA algorithm is non-symmetric key cryptography, communications, both Canada and the password is not the same solution, listener can not figure out the key parties, with strong encryption strength. Now commonly used in e-commerce payment systems, smart cards, banking system and the CA are used in the encryption algorithm. In 802.11 wireless networks, in order to ensure data security, using 256-bit WEP encryption standard, using the shared key and the RC4 encryption algorithm, can guarantee data stream during transmission are not tapped.