Aimed at the problem that wireless communication in the broadcast of the transmission has a threat against the military information on the safe transmission, this paper proposes a selflocating random coded signature mechanism (SRCSM) on the basis of asymmetric encryption technology. The method combines the LR signature algorithm with the random code through defining the receiving right of the physical area while the mobile receiver and the receiving end are communicating by the software logic to prevent the unrelated person or related person from receiving the encrypted information at the nonspecified location and preventing cases of unconscious leakage of a state secret. The paper briefly introduces the basic content of SRCSM, and combines it with asymmetric encryption technology to build a distributed data system with distributed data encryption system, and analyzes its complexity and execution efficiency, and finally analyzes it with data analysis. The experiments show that using SRCSM encrypted transmission, compared to non encrypted transmission, the longest test time increased by 26.67%, total test period 46.67%, CPU utilization rate increased by 50%, the test goes smoothly; when the packet loss rate is low and number of the monitored are large, the possibility of being monitored can be reduced by 5 orders of magnitude.