Yes, there are technical means to remotely turn on the camera on another person's computer and conduct real-time monitoring without authorization. These methods usually involve malicious software (such as trojan horses, spyware) or exploit. Here are some common ways： 1. **Malware**: An attacker can install malicious software on the target computer through phishing emails, malicious websites, or malicious programs disguised as legitimate software. These malicious software can remotely control the camera and even monitor in real time without the user noticing. 2. **Exploit**: If the target computer's operating system, camera drivers, or other related software have unpatched security vulnerabilities, an attacker can use these vulnerabilities to remotely access the camera. 3. **Remote Access Tool (RAT)**: Some remote access tools can help users remotely control computers for legitimate purposes, but if they are used maliciously, they can also be used to control cameras. 4. **Social engineering**: An attacker may use deception to induce users to install certain software or grant access to the camera to achieve control of the camera. ### How to prevent In order to prevent the camera from being accessed without authorization, the following measures can be taken： 1. **Keep software updated**: Update the operating system, camera drivers, and security software in a timely manner to patch known vulnerabilities. 2. **Install and update anti-virus software**: Use reliable anti-virus software and update it regularly to prevent malicious software from invading. 3. **Treat suspicious links and attachments with caution**: Do not click on links from unknown sources or download suspicious attachments, and avoid installing software of unknown origin. 4. **Disable or block the camera**: When the camera is not in use, you can disable the camera or use a physical shield (such as a camera cover) to prevent unauthorized access. 5. **Check the camera indicator**: Many cameras will light up when they are turned on. If the indicator light is found to be abnormally lit, it may mean that the camera has been illegally accessed. 6. **Use a firewall**: Configure a firewall to prevent unauthorized remote access. ### Law and Ethics Unauthorized access to other people's cameras is not only illegal, but also a serious violation of personal privacy. In many countries and regions, this behavior may face serious legal consequences, including criminal charges and civil compensation. Therefore, no matter how advanced the technical means are, they should not be used for illegal or unethical purposes. If you suspect that your camera has been accessed without authorization, you should take immediate measures to protect your privacy and consider reporting to relevant law enforcement agencies.