Samsung: Anyone's thumbprint can unlock Galaxy S10 phone

Discussion in 'Smartphones and Tablets' started by hmscott, Oct 26, 2019.

  1. hmscott

    hmscott Notebook Nobel Laureate

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    This article is not really effective in describing the real issue or whether Samsung's patch fixes the problem.

    Or, if those of us using a screen protector or using a case with a screen protector built in need to redo our finger print scans after installing the patch.

    Or if it's even possible for the software to "know" if it needs to correct for an added "gap" in focus created by putting a screen protector between the finger print sensor and our finger being scanned.

    A screen protector adds an air gap that blurs the clarity of the finger print scans and will store a "blurry" finger print which can match against other fingerprint's scanned through a screen protector by another person.

    I am unclear (pun intended) how a software patch will fix the physical situation of whether or not you have changed the ultrasonic focal distance - and how it would detect this situation, and how it would be able to correct the physical problem accurately.

    Do ultrasonic fingerprint scans work at all if done through a screen protector?

    Samsung: Anyone's thumbprint can unlock Galaxy S10 phone

    17 October 2019

    "A flaw that means any fingerprint can unlock a Galaxy S10 phone has been acknowledged by Samsung.

    It promised a software patch that would fix the problem. [but is that enough?]

    The issue was spotted by a British woman whose husband was able to unlock her phone with his thumbprint when it was stored in a cheap case.

    When the S10 was launched, in March, Samsung described the fingerprint authentication system as "revolutionary".

    Air gap
    The scanner sends ultrasounds to detect 3D ridges of fingerprints in order to recognise users.

    Samsung said it was "aware of the case of S10's malfunctioning fingerprint recognition and will soon issue a software patch".

    South Korea's online-only KaKao Bank told customers to switch off the fingerprint-recognition option to log in to its services until the issue was fixed.

    Previous reports suggested some screen protectors were incompatible with Samsung's reader because they left a small air gap that interfered with the scanning.

    Thumb print
    The British couple who discovered the security issue told the Sun newspaper it was a "real concern".

    After buying a £2.70 gel screen protector on eBay, Lisa Neilson registered her right thumbprint and then found her left thumbprint, which was not registered, could also unlock the phone.

    She then asked her husband to try and both his thumbs also unlocked it.

    And when the screen protector was added to another relative's phone, the same thing happened."

    The article simply stops there without adding any clarity to the situation...and the Level1 News guys/gal don't seem to understand it either...

    2:11 - Samsung: Anyone's thumbprint can unlock Galaxy S10 phone
    Last edited: Oct 26, 2019
    JRE84 and Vasudev like this.

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