CMPP 协议是中国移动通信集团公司所提出互联网短信网关接口协议。本文针对 CMPP 协议,提出安全性改进方案,并将其成功应用于公安部安全移动查询系统。 关键字:CMPP 协议,安全短信,安全策略 Abstract: CMPP protocol is China Mobile Peer to Peer protocol which is proposed by The China Mobile. In the paper, a secure scheme is designed to improve its security, and it is used in the police mobile query system. Key Words:CMPP, secure short message, secure policy