Technically, there are indeed some means to remotely turn on the camera on someone else's computer or mobile device and monitor it without authorization. These means usually involve malware (such as Trojans, spyware) or exploit security vulnerabilities in devices and software. Once the device is infected, these malicious programs may bypass the user's security settings and gain access to the camera, microphone and other sensitive hardware, thereby achieving real-time monitoring. **Common attack methods include:** 1. **Malware infection**: Through phishing emails, malicious download links or unsafe software sources, users are induced to download and install software containing malicious code. Once installed, these software may run in the background and access the camera and other hardware without the user's permission. 2. **Exploit software or operating system vulnerabilities**: Attackers may exploit vulnerabilities in the operating system, drivers or applications to gain high-privilege access to the device and control hardware such as cameras. 3. **Network attack**: If the device is connected to an unsecured network, attackers may gain control of the device through man-in-the-middle attacks or other network attack methods. **Protection measures recommended:** - **Install and update antivirus software**: Use reliable antivirus software and ensure that it is kept up to date to detect and block malware in a timely manner. - **Update software and systems regularly**: Install security updates for operating systems, applications, and drivers in a timely manner to patch known vulnerabilities. - **Be cautious with emails and downloads**: Avoid opening attachments from unknown sources or clicking on suspicious links, and make sure to download software only from official and trusted channels. - **Use firewalls and network security tools**: Enable the firewall that comes with the operating system, and consider using additional network security tools to monitor suspicious activities. - **Physically cover the camera**: When the camera is not in use, you can use physical covers (such as camera covers) to prevent unauthorized access. - **Strengthen the security of accounts and devices**: Use strong passwords, enable two-factor authentication, and regularly check authorized applications and permission settings on your devices. **Important Tip:** Unauthorized access to other people's devices and privacy is illegal and unethical, and may result in serious legal consequences. If you suspect that your device may have been infected with malware, it is recommended to take the above protective measures immediately and seek professional technical support.