what is this key shaped icon?

[Alexs1993]

So I did a factory reset on my phone because the battery life was just horrible, and after the restore I noticed a key icon at the top of my phone next tho the Bluetooth and wifi symbol. I'm not sure what that is, can anyone else tell me what it is and whats its used for?

[SHADOWGATE · Accepted solution]

It means you are on a Secured VPN (Virtual Private Network)