The remote monitoring technology itself exists, but unauthorized use is illegal and a serious violation of privacy. The following are objective technical analysis and protection recommendations： **Technical possibilities：** 1. Malware attack: Backdoor is implanted through phishing emails and trojan horses to control the camera hardware (for example, the camera indicator light may be disabled by hackers) 2. System exploit: Unpatched 0day vulnerability may be used for privilege escalation 3. Abuse of remote access tools: Accounts of legitimate software such as TeamViewer may be abused after they are stolen **Legal status：** Article 285 of our country's Criminal Law clearly stipulates that the crime of illegally controlling a computer information system is punishable by up to seven years in prison. Major countries around the world have similar legislation. **Protection recommendations：** 1. Physical protection: use the camera to physically block the cover (100% effective) 2. System security: keep the operating system and security software updated, and disable non-essential remote services 3. Rights management: Disable camera permissions for non-essential applications in system settings 4. Network monitoring: use a firewall to monitor abnormal data traffic 5. Security audit: regularly check system processes and startup items It is worth noting: the mainstream operating system (Windows/macOS) has added the camera usage prompt function since the vista era, and the technical threshold for completely concealed monitoring is extremely high. Any commercial software that claims to be able to completely conceal surveillance is suspected of breaking the law. The public does not need to panic excessively, but they need to maintain basic safety awareness. If suspicious signs are found, the network should be disconnected immediately and professional technical support should be sought.