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Out-of-list icon in status bar

Update:11-30Source: network consolidation
I got a strange icon (looks like a key) right next to the battery icon when I swipe down the status bar once. I have no idea what it is and how to turn it off. Please tell me what this icon stands for. Thank you.
Ps: How to attach a screenshot? -_-

The Best Answer

if you are using a phone or tablet to post > scroll to the bottom > tap on full version > then you should be able to see a picture/landscape icon > to add a picture, but you could do something a lot easier 
upload the picture on box or dropbox, etc and post the link here
"I'd rather be hated for who I am, than loved for who I am not." Kurt Cobain (1967-1994)