benanamen Posted March 17, 2016 Share Posted March 17, 2016 (edited) Does anyone know how facebook or banks do their logged in from new/unknown device routine? Have already googled. Have not found anything definitive yet. In testing, it is not by cookies. I deleted all my cookies and all facebook did was have me re-login. (Notification Settings are set to notify me of new device.) Edited March 17, 2016 by benanamen Quote Link to comment https://forums.phpfreaks.com/topic/301031-new-device-detection/ Share on other sites More sharing options...
Jacques1 Posted March 18, 2016 Share Posted March 18, 2016 The user agent is commonly used as a “device” identifier. Or the IP address. Quote Link to comment https://forums.phpfreaks.com/topic/301031-new-device-detection/#findComment-1532171 Share on other sites More sharing options...
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