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LewisChapman

macrumors 6502a
Original poster
Jan 10, 2015
600
861
Here’s another if this changes anything.
 

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mrklaw

macrumors 68030
Jan 29, 2008
2,750
1,026
As noted Apple has said that twins and close siblings could trick FID. However, if you can’t trust your twin or close siblings then you have far greater problems then your iPhone security.

Well the counterpoint to this is that close siblings and identical twins are far more likely to be around your phone.

So while fingerprints may only have been a 1-in-50,000 chance, that is across a random selection of the population
 

totulao

macrumors newbie
Nov 3, 2017
5
6
Did it unlock straight away the first time or did you play with it and unlocked it by passcode a few times during the day? If you did then it probably adapted itself to your face
 

LewisChapman

macrumors 6502a
Original poster
Jan 10, 2015
600
861
Did it unlock straight away the first time or did you play with it and unlocked it by passcode a few times during the day? If you did then it probably adapted itself to your face

It did it the first time I picked the phone up! Firstly it entered a password into a field from the keychain and we thought it was a bug but then a bit later we realised I could unlock the phone every time. And now it’s basically mine.
 
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mattopotamus

macrumors G5
Jun 12, 2012
14,743
6,116
Did it unlock straight away the first time or did you play with it and unlocked it by passcode a few times during the day? If you did then it probably adapted itself to your face

This is what I am curious about. Is it still unlocking for your face? Apple said it adapts and gets better over time. I would be interested to know if it stops working for you/him in a few hours or days.
 
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totulao

macrumors newbie
Nov 3, 2017
5
6
It did it the first time I picked the phone up! Firstly it entered a password into a field from the keychain and we thought it was a bug but then a bit later we realised I could unlock the phone every time. And now it’s basically mine.
That's so interesting :D
Since you two look so similar to eachother my guess is that it really adapted to your face after only one passcode since the differences between you two are so small :)
Did you try resetting face-id and check if you can get in immediately or if you need to enter passcode once before it adapts?
 

LewisChapman

macrumors 6502a
Original poster
Jan 10, 2015
600
861
This is what I am curious about. Is it still unlocking for your face? Apple said it adapts and gets better over time. I would be interested to know if it stops working for you/him in a few hours or days.

It’s currently still working, will try and get a video of some sort tomorrow if it’s still happening - is it worth doing do you think?
[doublepost=1509742193][/doublepost]
That's so interesting :D
Since you two look so similar to eachother my guess is that it really adapted to your face after only one passcode since the differences between you two are so small :)
Did you try resetting face-id and check if you can get in immediately or if you need to enter passcode once before it adapts?

Will reset it tomorrow and see if the false entry is still occurring.
 

convergent

macrumors 68040
May 6, 2008
3,034
3,083
Well the counterpoint to this is that close siblings and identical twins are far more likely to be around your phone.

So while fingerprints may only have been a 1-in-50,000 chance, that is across a random selection of the population

Right.... I like how everyone is making a joke about this, but another post on the first page I think said that his brother could open his too, and they aren't that close. So the question will be, how close do you have to be for it to work?
 

LewisChapman

macrumors 6502a
Original poster
Jan 10, 2015
600
861
Right.... I like how everyone is making a joke about this, but another post on the first page I think said that his brother could open his too, and they aren't that close. So the question will be, how close do you have to be for it to work?

My thoughts exactly. Could it be that twins will always be able to unlock each other’s devices?
 

NoBoMac

Moderator
Staff member
Jul 1, 2014
6,302
5,022
You may not be twins, but you are eerily similar. I recommend one of you elect to get a nose job, cheek and chin implants, and an eye lift. Small price to pay, really.

Apple will be rolling out the iLift add-on shortly, $499.

Groucho-Marx-glasses-001.jpg


Seem to recall reading somewhere that FaceID is an ever-learning system, in that it is updating itself with each scan of the face, to adapt to, say, face puffiness, for example. Can see OP triggering the unlock. Where it will be interesting is to hear if siblings can unlock a phone after a month or more of usage (ie. FaceID has trained itself well enough that similar sib features are not a false positive).
 

rafark

macrumors 68000
Sep 1, 2017
1,841
3,223
Hope it only fails with same sex siblings, because I'd hate it if it could unlock my sister. I don't trust her and she has attempted to use my device several times in the past when I'm away. I had to put a pass code because of that.
 

Ntombi

macrumors 68040
Jul 1, 2008
3,822
1,636
Bostonian exiled in SoCal
Apple will be rolling out the iLift add-on shortly, $499.

Groucho-Marx-glasses-001.jpg


Seem to recall reading somewhere that FaceID is an ever-learning system, in that it is updating itself with each scan of the face, to adapt to, say, face puffiness, for example. Can see OP triggering the unlock. Where it will be interesting is to hear if siblings can unlock a phone after a month or more of usage (ie. FaceID has trained itself well enough that similar sib features are not a false positive).
That’s a great question.
 

LewisChapman

macrumors 6502a
Original poster
Jan 10, 2015
600
861
Apple will be rolling out the iLift add-on shortly, $499.

Groucho-Marx-glasses-001.jpg


Seem to recall reading somewhere that FaceID is an ever-learning system, in that it is updating itself with each scan of the face, to adapt to, say, face puffiness, for example. Can see OP triggering the unlock. Where it will be interesting is to hear if siblings can unlock a phone after a month or more of usage (ie. FaceID has trained itself well enough that similar sib features are not a false positive).

That’s hilarious mate haha
 

KPOM

macrumors P6
Oct 23, 2010
18,312
8,326
That doesnt bode well for security. Alot of companies that relied on touchID for security will use this as a reason not to add FaceID support, especially banks and CC companies.
You are right about that. My company might disable FaceID. The ironic thing is that it is relatively easy to fool fingerprint ID systems.
 

JPack

macrumors G5
Mar 27, 2017
13,568
26,266
Here’s another if this changes anything.

Completely different between you and your brother.

Look at the position of your ears relative to your eyes and nose. Compare that to your brother. Entirely different.

I'm surprised Face ID didn't pick it up. There's a reason why training Face ID makes you rotate your head. Most facial recognition software relies on pupil distance, nose bridge width, and ear height.
 

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KPOM

macrumors P6
Oct 23, 2010
18,312
8,326
NO, you guys dont look like twins but indeed close. There are clear differences that can be seen and its pretty sad this "revolutionary" camera cant figure it out with 30,000 dots mapped on a face.
Hopefully this is something that can be addressed with software, if it does appear to be more widespread.
 
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