Is WiFi universal key useful?

You have a WiFi network you can access, of course you know the password, when you successfully access, if you also agree to share your network, then the cloud will save your network address and SSID and access password. This way, when someone else is in the cover of your WiFi network, he will ask for the password from the cloud. If you share it, it's easy for someone you don't know to get into your WiFi network, which is a network resource sharing, not that he can solve someone else's password.

WiFi Universal key is actually a WiFi password sharing function, if you are now in small knitting this Internet, small series can pass WiFi Universal key to share the WiFi, the next time you can directly use the password to connect.