Secure wireless network data transmission requires not only encryption
and decryption algorithms, but also the support of secure key distribution protocol. A
key distribution protocol (KDP) distributes the key to the message bearer in a secure
and efficient manner. There is no secure key distribution protocol, even if the use of
a powerful encryption/decryption algorithm, the whole system will exist insecure
factors. The commonly used encryption/decryption algorithms are either based on
public key or private key. And the private key password system is fast, but the security
performance is poor. This paper discusses the security key distribution protocol in
wireless network, which can improve the security of the system.