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noobinator

macrumors 604
Jun 19, 2009
7,203
6,761
Los Angeles, CA
The odds of someone unlocking your phone with FaceID that isn't you: 1 in a million (or whatever Apple says).

The odds of someone unlocking your phone with FaceID that isn't you who has stolen your phone or wants to gain unapproved access to your phone: 1 in a much more than a million.
 

fartnugget213

macrumors member
Apr 6, 2017
82
61
Just a quick thought:

If someone stole an X and walked around say... Manhattan NYC and tried to face unlock everyone, I wonder how successful that person would be :eek:
 

akash.nu

macrumors G4
May 26, 2016
10,769
16,730
Just a quick thought:

If someone stole an X and walked around say... Manhattan NYC and tried to face unlock everyone, I wonder how successful that person would be :eek:

The phone will lock out for some time after a certain number of incorrect matches. It will get so tedious that the guy will probably just give up.
 
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PieTunes

Contributor
May 6, 2016
1,005
1,856
San Diego, CA
If the odds of getting another face to unlock my X is 1 in a million, then that's another 320 or so people in the country who would be able to do this. Then let's factor in the actual odds of encountering one of these people to begin with, on top of having that person steal my phone from my possession and actively try to gain access. We are quickly approaching the realm of astronomical probability here. I'm quite content with the security of those odds.
 

Bobioden

macrumors 68000
Sep 23, 2007
1,725
46
Denver
My boss can unlock my iPhone X, he has done it on 10 or more occasions. We are both over 60, have white hair and goatees. I was shocked the first time he did it. I have reset my face ID, a couple times, he looks at it and it opens right away.
 

saltd

macrumors 6502a
Aug 1, 2010
760
371
Just a quick thought:

If someone stole an X and walked around say... Manhattan NYC and tried to face unlock everyone, I wonder how successful that person would be :eek:
Scanning a million faces would take years. Unless you got lucky, the phone wouldn’t be worth much by then.

Sounds like a good idea for a YouTube video though :)
 

Recognition

macrumors 6502a
Jun 27, 2013
596
673
My boss can unlock my iPhone X, he has done it on 10 or more occasions. We are both over 60, have white hair and goatees. I was shocked the first time he did it. I have reset my face ID, a couple times, he looks at it and it opens right away.
Your boss looks like you. That’s what that means.
 

thesaint024

macrumors 65816
Nov 14, 2016
1,073
888
suspension waiting room
1 in a million doesn't mean impossible. Given that there are 6 or 7 billion in the world, 7,000 people could unlock your phone statistically. I'll take my chances. I took my chances with the 1 in 20,000 odds with TouchID. The scenarios that either phone would be cracked this way are pretty small. I can't believe this is news.
 

C DM

macrumors Sandy Bridge
Oct 17, 2011
51,389
19,457
1 in a million doesn't mean impossible. Given that there are 6 or 7 billion in the world, 7,000 people could unlock your phone statistically. I'll take my chances. I took my chances with the 1 in 20,000 odds with TouchID. The scenarios that either phone would be cracked this way are pretty small. I can't believe this is news.
I'm trying to recall if there were similar stories circulating around people unlocking other people's devices with Touch ID.
 

thadoggfather

macrumors P6
Oct 1, 2007
15,341
15,969
My boss can unlock my iPhone X, he has done it on 10 or more occasions. We are both over 60, have white hair and goatees. I was shocked the first time he did it. I have reset my face ID, a couple times, he looks at it and it opens right away.

Lol

It profiles you
 

thesaint024

macrumors 65816
Nov 14, 2016
1,073
888
suspension waiting room
I'm trying to recall if there were similar stories circulating around people unlocking other people's devices with Touch ID.
I only recall stories about using sleeping people's thumbs to unlock the phones. I imagine chances of a random person accidentally unlocking a TouchID is remote unless they were trying to intentionally unlock it. You don't put your thumb on a locked phone unless you are right? However, someone could just pick up you X and not be trying to unlock it, but surprise! So probably less random stories like that. I wasn't worried even when I had TouchID. I've never heard of someone's phone getting hacked with these biometric devices for intentional, nefarious reasons. But, I live in a bubble.
 

clement477

macrumors newbie
Dec 15, 2017
4
1
Hi! just got my iPhone x 2 days ago.
I realized when I saw some other iPhone X , when the user unlocks it, there will be purple lights at the notch blinking.
However, mine doesn't have the purple lights at the notch blinking but I am still able to unlock it with face id normally.
Any idea why? Why is there the purple lights?
 

C DM

macrumors Sandy Bridge
Oct 17, 2011
51,389
19,457
Hi! just got my iPhone x 2 days ago.
I realized when I saw some other iPhone X , when the user unlocks it, there will be purple lights at the notch blinking.
However, mine doesn't have the purple lights at the notch blinking but I am still able to unlock it with face id normally.
Any idea why? Why is there the purple lights?
You saw a phone with lights blinking? Or you saw a video of a phone where those lights appeared?
 
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clement477

macrumors newbie
Dec 15, 2017
4
1
You saw a phone with lights blinking? Or you saw a video of a phone where those lights appeared?
Both.. But does the purple light blinks when u unlock your iPhone x? I think the purple light is the dot projector or the infrared camera
 

C DM

macrumors Sandy Bridge
Oct 17, 2011
51,389
19,457
Both.. But does the purple light blinks when u unlock your iPhone x? I think the purple light is the dot projector or the infrared camera
There is no visible (to human eyes) light that should appear. Some cameras are more sensitive to infrared can pick up some of it at times, so in some videos that might appear.
 
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clement477

macrumors newbie
Dec 15, 2017
4
1
There is no visible (to human eyes) light that should appear. Some cameras are more sensitive to infrared can pick up some of it at times, so in some videos that might appear.
ahh.. I see.. but I saw it with one of my friend's iPhone x and its there too.. Not sure but I will check again.
You use an iPhone ? does the light appear at the notch when u unlocking it?
 

44267547

Cancelled
Jul 12, 2016
37,643
42,522
My boss can unlock my iPhone X, he has done it on 10 or more occasions. We are both over 60, have white hair and goatees. I was shocked the first time he did it. I have reset my face ID, a couple times, he looks at it and it opens right away.

There will be those very rare occasions where you will have somebody that resembles you where Face ID can be unlocked. But those rates are marginal at best and are not the same situation for most iPhone X users.
 

garrym13

macrumors member
Jun 22, 2012
47
22
1 in a million doesn't mean impossible. Given that there are 6 or 7 billion in the world, 7,000 people could unlock your phone statistically. I'll take my chances. I took my chances with the 1 in 20,000 odds with TouchID. The scenarios that either phone would be cracked this way are pretty small. I can't believe this is news.
That is not how stats work.... It is adding a statistical value to the rarity of it occurring. In my field we call that Prosecutor's fallacy. If i were to put 759992400 billion red chips chips in a bag plus 7600 black chips and let you draw, you will NOT pick black 7600 times in 7.6 billion draws.
 

C DM

macrumors Sandy Bridge
Oct 17, 2011
51,389
19,457
That is not how stats work.... It is adding a statistical value to the rarity of it occurring. In my field we call that Prosecutor's fallacy. If i were to put 759992400 billion red chips chips in a bag plus 7600 black chips and let you draw, you will NOT pick black 7600 times in 7.6 billion draws.
If you left out the chips that you took out each time, wouldn't that be the case?
 
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