Face Unlock: A Deep Dive

  1. Pete
    Founder of OnePlus Staff Member Nov 20, 2017

    Pete , Nov 20, 2017 :
    Face Unlock A Deep Dive.png

    Hi everyone,

    Louis, our product manager, recently wrote a post about how the18:9 display, back fingerprint sensor and Face Unlock work together, but we also wanted to share a deeper dive into Face Unlock, which unlocks the phone in 0.4 seconds.Even though sales for the OnePlus 5T have just opened, we have already received a lot of questions about the technology. Therefore, we would like to offer a behind-the-scenes look into why we introduced Face Unlock and the technology behind it.

    On previous OnePlus devices, we placed our speedy, ceramic fingerprint sensor on the front to give users convenient and fast access to their phones. So, when we moved the fingerprint sensor to the back on the OnePlus 5T, we wanted to provide users a way to unlock the phone from the front of the device – with a focus on convenience and ease of access. Face Unlock is only designed as an additional option to open your device for the sake of convenience - Face Unlock is not enabled for Android Pay and other secure apps, such as banking apps. As we have seen from similar technologies, “100% secure” simply doesn’t exist, and that is why we still see the fingerprint sensor as a more secure method.

    We will continue to optimize the technology, but we also want to explain how the technology works.

    1) Face Unlock makes sure it is you. It does so by analyzing, through the front camera, over 100 identifiers on your face such as the distance between your eyes or between your nose and upper lip. We have included numerous parameters, so that Face Unlock works in different lighting conditions as well as when you are wearing glasses.

    2) Face Unlock makes sure is it you and that you are "alive". In simple words, the technology reduces the chance that someone will try to unlock your phone using a picture. There are multiple checks carried out such as analyzing the 3D aspect of the subject. To avoid putting out a checklist for people to use to work around Face Unlock, we would like to share one that we are currently working on that will be released in an upcoming OTA.

    To try to trick Face Unlock, someone might use a selfie on another phone and place this selfie in front of the OnePlus 5T in an effort to unlock it. Even though in real life you can argue that the risks of someone having physical access to your phone as well as a detailed enough selfie are low, we are always working to optimize Face Unlock. In an upcoming update, the phone will understand whether the subject is emitting light (a phone) versus reflecting (your actual face) by analyzing shadows and bright areas. Other current checks related to this particular scenario is to look for screen reflections, the presence of a square element (shape of the phone) and more. We are dedicated to constantly optimizing Face Unlock, much like we do with OxygenOS as a whole, and this is but one example.

    3) To reduce the chance of someone trying to trick Face Unlock with multiple pictures, after five unsuccessful attempts, Face Unlock is deactivated, requiring you to use the fingerprint sensor or security code/pattern to unlock your phone. Also, for extra security, data sensitive apps such as banking apps can be added to our OxygenOS feature, App locker (settings>security & lock screen>App locker), which requires a fingerprint or security code/pattern to open the app, even if the phone was initially unlocked with Face Unlock.​

    We hope our brief explanation of how Face Unlock works helps you to understand more about our latest feature. If you have any further queries, please do drop your question in the comments below.

  2. keithnyc
    Moderator Moderator Nov 21, 2017

  3. Dextter
    Jelly Bean Nov 21, 2017

    Dextter , Nov 21, 2017 :
    well if face unlock is active it's hard to see lock screen and lock screen notification.

  4. youbi
    Assistant Head Moderator Assistant Head Moderator Nov 21, 2017

    youbi , Nov 21, 2017 :
    Since the FP sensor is now on back it really seems a good way to minimize the not so good unlocking the phone when on a table. So thanks for that. ;)

    And according to the reviews it seems to be quite good overall, "the verge" review only complained about its use under nightclub lights. :p :D

    Ohh, and now you know what everyone will keep asking:

    "Will it come for the older devices? "

  5. BlackPanther01
    Gingerbread Nov 21, 2017

    BlackPanther01 , Nov 21, 2017 :
    Well my question is that r there any specific modules or instrument needed for face unlock like in X? Or it can also available to older devices.

  6. Tobikage
    Nougat Nov 21, 2017

    Tobikage , Nov 21, 2017 :
    I'm sure there's no reason not to trust OnePlus with our faces now that they already have our data.

    Thanks OnePlus !!

  7. pablofg1978
    Head Moderator Head Moderator Nov 21, 2017

    Punk_69 likes this.
  8. luxuskamel
    Marshmallow Nov 21, 2017

    luxuskamel , Nov 21, 2017 :
    Thanks for the good explanation!

    The frontcamera is the only sensor right? So will it also come to older devices?

    anyway hopefully people will understand now that it is not "trusted faces"

  9. G_Bla_“MastTheking”_
    Froyo Nov 21, 2017

  10. GuitarBart
    Jelly Bean Nov 21, 2017

    GuitarBart , Nov 21, 2017 :
    Interesting and a good choice to let them work together for optimal security and fast unlocking of the phone. I hope this will also be implemented on the 5.

  11. kingkw
    Froyo Nov 21, 2017

    kingkw , Nov 21, 2017 :
    Its a nice feature to have plain and simple. Is it the end all be all of course not but its a nice add on for quick access.

  12. Jaison Blessing
    Froyo Nov 21, 2017

  13. Tejaswi_Kvr
    Eclair Nov 21, 2017

    Tejaswi_Kvr , Nov 21, 2017 :
    Please update our OnePlus 5 devices with this new face lock feature so that we will be happy.

    From OnePlus and apple fan.

  14. vitthalsing
    Eclair Nov 21, 2017

  15. sunilr1491
    Ice Cream Sandwich Nov 21, 2017

    mart2print likes this.
  16. Punk_69
    Lollipop Nov 21, 2017

    Punk_69 , Nov 21, 2017 :
    So yea I was wrong .... there were no extra sensors , and its all software !

    So can it be implemented on the OP3 ,3t and 5 ?

    I'm not so interested in the face unlock, but yea it'll be good to have

    well basically everyone is gonna ask this .....[​IMG]

  17. Dunnow
    The Lab - OnePlus 6 Reviewer Nov 21, 2017

    Dunnow , Nov 21, 2017 :
    is this running on top of Google's trusted face implementation or is it the one OPPO or VIVO already use?

    Is any of my "face" parametric data being send to OnePlus at any stage?

  18. dcmcc24
    KitKat Nov 21, 2017

    dcmcc24 , Nov 21, 2017 :
    Thanks for the info. I will continue to use fingerprint, but it's a good option for people.

  19. whodatboiyo
    Gingerbread Nov 21, 2017

    whodatboiyo , Nov 21, 2017 :
    <rant start>
    I don't know why everyone is suddenly asking for face unlock feature on older devices. Although it would be nice to have a new feature to have but we have already have got perfectly placed fingerprint scanner at the front. The accuracy and speed of fingerprint unlock is better than face unlock on 5T (also clarified by OnePlus). Just get done with asking for face unlock goddammit.
    <rant end>

    Mr. BG and Saxon_au like this.
  20. PARTHI_SaNjay
    Honeycomb Nov 21, 2017

    PARTHI_SaNjay , Nov 21, 2017 :
    Im using 3t i dont want face unlock... please give the separate password/PIN/Fingerprint feature for applock.... meanwhile Screenlock and applocks unlocks with same password/PIN/Fingerprint...Even 6000Rs xiaomi phones have this feature but the 35000Rs phone not have this...please consider this ASAP