VPN (Virtual Private Network) allows you to connect to a public or private server over the internet, providing internet access as if you're on a private network. If used improperly, VPNs can be accessed to access sensitive information, files, or even supply information, which may be referred to as "泄密" (leaking information or access). If you're using a VPN for legitimate purposes, it's important to ensure that it's secure and that you're using it for the intended purpose rather than for unauthorized access. If you're concerned about your privacy or the security of your data, it's a good idea to use a VPN with strong encryption and consider setting up a VPN that is encrypted with your password.