Windows Phone 8.1 and Windows 10 contain a feature called WiFi Sense: http://www.howtogeek.com/219700/what-is-wi-fi-sense-and-why-does-it-want-your-facebook-account/ Aside from the obvious privacy issue of uploading your WiFi credentials to Microsoft, there are some more issues. -Afaik when you connect to a new network with a W10/WP8.1 device, sharing the credentials is opt-in(not checked by default.) However there is no confirmation whatsoever this will not send the credentials to MS, only that your contacts can't access it, perhaps you need to disable WiFi Sense completely. -You can only choose which kind of contacts are allowed access(Facebook, Skype and Outlook.com), when you allow access to any of these categories, all of your contacts in this category have access, there is no whitelisting/blacklisting feature for specific contacts. -The feature requires you to enable Location Services. -As owner of a WiFi network you have to opt-out(by adding _optout to your SSID) if you don't want your network 'assimilated' by WiFi Sense. Some more links: WiFi Sense FAQ: https://www.windowsphone.com/en-in/how-to/wp8/connectivity/wi-fi-sense-faq (Answers all kind of privacy/security related questions of what your contacts can access, but nothing on what MS can access and how your credentials are stored/protected at MS. Opting your network out of WiFi Sense: https://www.windowsphone.com/en-us/...ty/how-do-i-opt-my-network-out-of-wi-fi-sense Some technical assumptions here in the reactions, but nothing confirmed: https://twitter.com/liamosaur/status/615693930986885121
Though I don't agree with most of it, he does make some points. However, he left out a very important part: your WiFi credentials get saved on MS servers, and there isn't any information on how they're protected and if MS has access to them.
I disagree, for the general public it can be a good idea because it encourages stronger passwords. It should also be noted that this is an opt-in and not set on by default. They did get that bit right and not make it default.
Either way, I'm way too paranoid for this stuff. In Holland, most providers also came up with the idea to turn home user modems into WIFI Hot-spots, another ridiculous idea.
Just to clarify, I would never use wifi sense, but can understand the convenience for the masses. I dont even use cloud storage for anything other than encrypted data.