According to an article published on the 14th WeChat official account of the Ministry of National Security, many users have received a request prompt that "XX wants to send you a picture across the air" on their mobile phones. As a quick function for daily sharing of files and pictures, "across the air" may not only facilitate our data transmission, but also be targeted by criminals and people with ulterior motives, bringing potential risks to personal information and national security. Convenient functionality and hidden risks "air delivery" is a system function based on Bluetooth discovery and Wi Fi direct connection technology, which enables rapid transmission of data such as photos and videos between devices. Criminals may set the device to "everyone can receive" mode and send receiving requests to surrounding users indiscriminately. Once users accidentally click "receive", they will not only receive malicious information, but also pose a risk of personal privacy data leakage. Attackers may also exploit vulnerabilities in transmission protocols to remotely manipulate user devices and silently turn on cameras. If this vulnerability is exploited by foreign anti China hostile forces to carry out espionage, it will directly threaten national security. ——Used to create panic. Public cases have shown that illegal individuals have used the "air delivery" function in public places to randomly deliver vulgar and harmful information to the public, causing public panic. The individuals involved have been dealt with in accordance with the law. ——Used as a source of rumors. Public cases show that Yang, a domestic individual, was recruited by hostile forces against China abroad during his study abroad and participated in illegal protests. In an internal group chat about illegal activities, Yang proposed using Wi Fi hotspots and "air delivery" functions to spread harmful comments, intending to expand the negative impact. Later, Yang was dealt with according to law. ——Regarded as a secret passage. Public cases have shown that multiple overseas anti China hostile forces use free equipment and shared information as bait to recruit domestic personnel to illegally collect sensitive data, and the covert "air delivery" is precisely the "accomplice" of such espionage behavior. To maintain national security and strengthen the information defense line, we need to start by regulating the use of information functions and being vigilant about the risk of leaks. ——Strictly control the receiving authority: it is strictly prohibited to transmit and process confidential information through non confidential channels such as the Internet and wireless network. It is recommended to set the receiving range of personal electronic equipment to "contact only" or directly turn off relevant functions. ——Reject unfamiliar delivery: Delivery requests from unknown sources, especially those containing suggestive titles such as "internal files", should be rejected uniformly to prevent malicious program implantation or information leakage. ——Timely update the system: It is recommended to install software from official app stores and other channels, regularly update the mobile system, patch security vulnerabilities, strengthen device protection, and reduce the risk of technical attacks. If the masses of the people find that they are stealing secrets or spreading sensitive content by using the function of "air separation delivery", they can report directly to the local national security authorities through the 12339 national security authority report acceptance telephone, the online report acceptance platform (www.12339. gov.cn), the WeChat official account of the Ministry of National Security or the local national security authority. (New Society)