Abstract: In the view of the problems of plain text transmission of random numbers, high storage cost of access points and large amount of bit communication required for authentication in authentication and key agreement (AKA) protocol access authentication scheme, a lightweight AKA protocol encryption access authentication scheme is proposed. The scheme used a lightweight cryptographic algorithm ZUC to encrypt the information needed to be transmitted, adjusted the order of transmission, and introduced Hash chain technology, which improved the security of access authentication and reduced the communication times and storage burden. The scheme could be better applied to the space-ground integrated network environment with limited computing capacity, storage space, power and channel bandwidth.