Wi-Fi passwords and guest networks
Share guest Wi-Fi more easily while treating the QR code like a password.
A guest Wi-Fi network gives visitors internet access without sharing your main network password. A QR code makes joining easier, but the code should be treated like the password because anyone who scans it may be able to connect.
Set up and share guest Wi-Fi
A guest network can keep visitors away from computers, printers, and other devices on your main network, but you may need to turn that separation on in your router’s settings. For most home routers, choose WPA/WPA2 Personal and use a password between 8 and 63 characters. WEP is outdated and unsafe for a new network.
Enter the Wi-Fi name exactly as it appears, including spaces and capital letters. You can also mark the network as hidden, although some phones may not join a hidden network from a QR code.
Treat the QR code like the password
Anyone who scans the code may be able to join the network. The printed password is off by default, but the QR code still contains the information needed to connect. Share the card only with people you want on the network.
When guest access should end, change the password in your router and replace any old cards. Test the finished QR code with the phones your guests are likely to use before putting it out.