Face ID Double Security Feature!

Discussion in 'iPhone' started by donster28, Nov 10, 2017.

  1. donster28, Nov 10, 2017
    Last edited: Nov 11, 2017

    donster28 macrumors 65816

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    #1
    Been using the iPhone X since launch regularly (and who hasn't) and noticed a security feature that locks Face ID if it thinks you're trying to fool it. Has anyone notice it?

    If someone else tries to unlock your phone via FaceID it will most certainly fail, but if the phone is passed to the registered owner and tries it again immediately after (without turning the phone off), it won't unlock until you actually turn the screen off and on again (or hit cancel and swipe again). I discovered this when I was showing off FaceID to my friends, and every single time it did this, which was kind of embarrassing.

    Similarly, if FaceID fails to recognize the registered owner's face the first time, it will not function until the phone is turned off and on again or cancelled and swiped again.

    As far as I know, this is not in Apple's documentation online so if anyone thinks it's failing on them, think about my observation above.
     
  2. BrettDS macrumors 65816

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    #2
    I’m not quite sure what you’re saying here. From my observations it seems like Face ID is a one shot thing... once it sees a face it tries to authenticate it and if it fails then it won’t keep looking for more faces until you cancel and swipe up again or turn the phone off and on again.

    I’m not sure if it’s a security feature or just a way to keep from reading and failing on the same face over and over again.
     
  3. TinyChip macrumors member

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    #3
    When Face ID fails to authenticate for the owner, don’t cancel or switch it off. Instead, enter your passcode so that Face ID reliability improves by adding new data about the owner’s face. Apple has said there’s machine-learning tech in Face ID.
     
  4. donster28 thread starter macrumors 65816

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    #4
    That’s exactly what I’m talking about. The fact that you won’t be able to use it after a failed attempt, unless you turn the phone off and on, makes me think that was done purposely as an added security feature.
     
  5. BrettDS macrumors 65816

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    #5
    But you don’t have to turn the phone on and off. Like I said above, when the password prompt comes up you can also hit cancel and then swipe up again and it will check another face.
     
  6. tromboneaholic macrumors 65816

    tromboneaholic

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    #6
    Just swipe up again
     
  7. donster28 thread starter macrumors 65816

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    #7
    Sorry I missed that...is that documented somewhere?

    In any case, what I’m saying is that if someone else tries to unlock the phone via FaceID, and one who doesn’t know my passcode, the phone will not unlock via FaceID until it’s turned off and on. Now if it’s me it didn’t recognize the first time, I can simply type my passcode and the tech will learn in time, right?
     
  8. tromboneaholic macrumors 65816

    tromboneaholic

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    #8
    No. You don’t have to turn your phone off. End of story.
     
  9. donster28, Nov 11, 2017
    Last edited: Nov 11, 2017

    donster28 thread starter macrumors 65816

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    #9
    Pardon me, yeah, you can swipe up (updated my original post). The mere fact it’s wanting to start over (either via switch or swiping up) is the extra security feature I’m getting to.
     
  10. tromboneaholic macrumors 65816

    tromboneaholic

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    #10
    It’s the same security feature. You need to unlock with face or enter passcode.

    It does not unlock with someone else’s face or passcode.
     
  11. donster28 thread starter macrumors 65816

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    #11
    Yeah, I know that.

    That’s not what I’m trying to convey...yeah you can swipe up instead of turning the phone off, whatever but the fact it’s wanting you to start over is the added security I’m talking about.
    --- Post Merged, Nov 11, 2017 ---
    Sorry but you lost me...thanks for chiming in anyway.
     
  12. tromboneaholic macrumors 65816

    tromboneaholic

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    #12
    It’s giving you another chance to log in. What else do you expect?
     
  13. BrettDS macrumors 65816

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    #13
    I’m not sure I see that as a security feature. I suspect that there is a technical reason that it works the way it does.

    But exactly how do you see this as being more secure?
     
  14. donster28 thread starter macrumors 65816

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    #14
    I see it not as a technical limitation of Face ID but a function. Of course there are times that Face ID will fail (due to the phone’s angle, etc.), but there are times it just won’t unlock your phone because it saw a different face altogether and immediately trying to unlock it with the proper registered face afterwards will not do it unless you start over. That’s what I’m trying to say here. You would think it will unlock after seeing the registered face immediately (while the screen is still on and was not turned off), but it will not unless you start over.
     
  15. tromboneaholic macrumors 65816

    tromboneaholic

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    #15
    How is this more secure?
     
  16. BrettDS macrumors 65816

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    #16
    I get that, but I don’t understand where the extra security comes from. Someone can simply hit cancel and swipe up again pointing the phone at you this time if they are trying to break in.
     
  17. donster28 thread starter macrumors 65816

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    #17
    The extra security feature (or extra effort needed - if we don’t have to call it a security feature) was implemented to give it a some sort of “pause”. It’s Face ID’s way of telling the user: “Hey! Start over..I don’t trust you”.

    And to me this is the added security or “sense of security”, if I may call it that.
     
  18. tromboneaholic macrumors 65816

    tromboneaholic

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    #18
    What extra feature or effort was implemented?
     

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