ID4me is an internet service that enables its users to log in to many different internet services with one account. This is also known as "single sign on".
Unlike existing global single sign on solutions like the ones from Google or Facebook, ID4me does not track and analyze the internet surfing habits of its users. ID4me will make sure that the surfing habits stay secret.
Also, ID4me does not belong to an enterprise. It is an open standard that is maintained by a nonprofit organization. Anyone who wants to can participate. This way the users can chose freely between different ID4me providers and can also change the provider anytime.
The Galaxy S4 looks almost exactly like the Galaxy S3, but the differences are in the details: a wide chrome-look plastic strip frames the housing, and the physical home button, which Samsung does not seem to ever want to give up, has a slightly different shape than the S3. Furthermore, the battery cover has a subtle grid texture, and there's obvious improvements to the hardware, including bigger display, faster processor and better camera. Despite the larger screen, the S4 is not really larger than the S3, in fact it is somewhat narrower and a little more square and angular.