关键词: 便携式计算机, 方位信息, 防盗, 告警, 无线认证协议

Abstract: Once the laptop computer with classified information got lost or was stolen, it would lead to inestimable loss. Aiming at improving the burglarproof technology of military laptop information, this paper introduced a burglarproof alarm scheme used in master-slave computer system, which is based on bidirectional wireless communication technology. It designed physical isolation between slave devices and computer main-board of alarming system in computer case for protecting information from electromagnetism leakage. By adjusting transmit power and receiver sensitivity of wireless communication module in master-slave computer of alarm system, it is possible to make master give a warning signal and control the slave to response, when the distance of device taker and military laptop which equipped with alarm system is larger than the threshold. Enhance the wireless authentication and insure the communications security between master and slave by using custom protocol communication. According to the test verification of prototype, the feasibility of this method was proved.

Key words: portable computer, direction information, antitheft, alarm, wireless authentication protocol