JERAJournal of Electronic Research and Application2208-35022208-3510Bio-Byword Scientific Publishing Pty. Ltd.10.26689/jera.v4i5.1600ArticleHow to Achieve Both "Physical Isolation" and "Secure File Transfer" under the State of Strong Supervision https://artdesignp.com/journal/JERA/4/5/10.26689/jera.v4i5.1600AiMin,ZhuDonglin,ZhangYingli,TaoWan,WeiXin2020452020-11-16Communication security involves all aspects of the country and society, and financial security is of top priority. Through strong supervision and strong technical means, a "semaphore" file exchange station is established. The data transmission system is composed of a sending server, a receiving server, and a "semaphore" communication box. Physical connections between internal and external networks are eliminated to achieve the purpose of "physical isolation" and "secure file transfer".