Research on the Mechanism of Asynchronous Communication Protocol of Geographic Space Information Service Access

At present, the traditional way of accessing to the classified network of geographic spatial information services is using network gate Reeper, firewall and etc to ensure the public and classified network communications links. However, the physical isolation between classified network and public network is crossed, which is bound to cause classified network potential security hazard. In provincial space land dynamic monitoring integration project, it proposed the point to point text message communication protocol and asynchronous transmission mechanism. Using geo-spatial information encryption processing and data compression processing method, it reduced the risk of data and ensured data security, which realized geographic spatial information communication effectively in the field conditions.