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Author Topic: Samsung fingerprint Id, any thumb will do  (Read 1060 times)

sevenlayermuddle

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Samsung fingerprint Id, any thumb will do
« on: October 17, 2019, 12:23:08 PM »

Oops

https://www.bbc.co.uk/news/technology-50080586

Fear not, even as an Apple devotee, Iím not gloating.  The root login bug on Mac OS Mojave, that allowed root login without a password, must rival this one. :D
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Alex Atkin UK

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Re: Samsung fingerprint Id, any thumb will do
« Reply #1 on: November 15, 2019, 03:49:58 AM »

This was rather hilarious.  I can't unlock my S10 WITH my thumb, but if I put a gel screen protector on then anyone could have, lol.

How this malfunction actually worked rather suggests a HUGE flaw in how its detecting fingerprints in the first place.  How can you possibly fool it so that ANY worked?  How can we trust the fix (which has now rolled out) doesn't have other flaws?
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broadstairs

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Re: Samsung fingerprint Id, any thumb will do
« Reply #2 on: November 15, 2019, 10:37:23 AM »

I have always used a passcode on my Samsung phones despite the latest one having a fingerprint reader, this is so my wife can access it in an emergency without having to use my fingerprint! Sounds like I should not have bothered!

Stuart
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sevenlayermuddle

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Re: Samsung fingerprint Id, any thumb will do
« Reply #3 on: November 15, 2019, 11:04:03 AM »

Researching the issue, itís not as bad as the impression I was left with after reading the article on BBC, who got it from The Sun.

The actual problem seems to be that if you apply a screen protector before recording your fingerprint, then pattern of the screen protector itself gets recorded as if it were a fingerprint.   Subsequently when another person touches, if the screen protector is still there, the phone unlocks.

So although itís an embarrassing bug, it doesnít necessarily mean somebody else can just take somebody elseís phone, stick on a screen protector and unlock it.   Presumably, the only precaution needed is to make sure you record your fingerprint with the screen *naked?

*Stress, thatís the screen naked, not the user.
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jelv

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Re: Samsung fingerprint Id, any thumb will do
« Reply #4 on: November 15, 2019, 11:10:15 AM »

Interesting. The glass screen protector for my Nokia 6 does not cover the finger print detector (there's a cut out in the glass). The Motorola G7 Power* we recently bought for my wife has the finger print detector on the back.

@Broadstairs On both phones you can add multiple fingerprints (very useful if you cut your finger and have to put a plaster on it!) which I think would be the same on all makes, so there's no reason for that stopping your wife accessing your phone.

* The battery life on this is phenomenal which is why she picked that phone.
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broadstairs

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Re: Samsung fingerprint Id, any thumb will do
« Reply #5 on: November 15, 2019, 03:05:42 PM »

@Broadstairs On both phones you can add multiple fingerprints (very useful if you cut your finger and have to put a plaster on it!) which I think would be the same on all makes, so there's no reason for that stopping your wife accessing your phone.

Well it's a great idea except my wife hates technology so I've as much chance of getting her finger print as the Klingon's winning the election!  :lol:

Stuart
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sevenlayermuddle

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Re: Samsung fingerprint Id, any thumb will do
« Reply #6 on: November 15, 2019, 03:09:29 PM »

as the Klingon's winning the election!  :lol:

Are they fielding candidates?  Iíve yet to warm to any of the usual ones.
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Ronski

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Re: Samsung fingerprint Id, any thumb will do
« Reply #7 on: November 15, 2019, 06:36:00 PM »

Well it's a great idea except my wife hates technology so I've as much chance of getting her finger print as the Klingon's winning the election!  :lol:

Stuart

In my experience with Android even if you use a finger print you still need to have a pin number as a backup.

Both my wife's and my phone are setup with our own finger prints, but we use the pin number to access each others phones.
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