Microsoft has patented end-to-end security for hardware running verified software. This comes at a time at which encryption and software security is a big, important topic for not only traditional computers, but mobile devices as well. Windows Phone 8.1 has device encryption - but only if you're got your device set up at an enterprise level. Windows Phone 10 (or Windows 10 Mobile, if you prefer) has Device encryption built in for everybody. Just like a real good device manufacturer should mean it to be.