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A comment on The Pixel 4’s face unlock works on sleeping people. Parent comment

Re:The Pixel 4’s face unlock works on sleeping people by scarface74 on Friday October 18, 2019 @06:09PM (#21295459)
Detached fingers don’t work with modern implementations of fingerprint sensors.
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Re:The Pixel 4’s face unlock works on sleeping people by munk-a on Friday October 18, 2019 @06:11PM (#21295474)
Oh, I was unaware of that - so I'm not certain I want to rely on the knowledge of someone in a position to cut off my finger... additionally, they don't currently work, but I'm sure there could be developed ways to spoof them by artificially circulating warmed blood or some such.

Just... biometrics are such a terrible idea - let's not even open that door.

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Re:The Pixel 4’s face unlock works on sleeping people by rolph on Friday October 18, 2019 @07:16PM (#21295814)
the problem isnt weather or not its true, the problem is how likely someone is to try using a severed part any way, because it just might be FUD and a dead finger is just as good as attached. aside from that, a severed finger continues to live for a while afterward, it doesnt instantly perish. it has to metabolize its oxygen reserves.
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Re:The Pixel 4’s face unlock works on sleeping people by scarface74 on Saturday October 19, 2019 @10:30AM (#21298681)
The most popular and high priced phone has had fingerprint authentication since 2013. If there was going to be a rash of people cutting off fingers, wouldn’t it have happened by now?
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Re:The Pixel 4’s face unlock works on sleeping people by rolph on Saturday October 19, 2019 @01:55PM (#21299755)
If it happened would any PR department admit it? so far the tactic of waiting for someone to unlock a phone then robbing them has been effective. as soon as it becomes required behaviour it will happen. so far there are methods of hijacking a phone from its original owner, even without the phone in hand [simjacking] and as such tactics are stymied, other more brutal force methods would be required.
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Re:The Pixel 4’s face unlock works on sleeping people by scarface74 on Saturday October 19, 2019 @04:05PM (#21300473)
You really don’t think that would make the news? Why would you have to depend on the PR department? It sounds like another panic without any basis in reality.

And now, that phones are moving toward face recognition isn’t kind of a moot point?

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Re:The Pixel 4’s face unlock works on sleeping people by hundchenkatze on Friday October 18, 2019 @06:17PM (#21295513)
I'm not convinced that's true.
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Re:The Pixel 4’s face unlock works on sleeping people by scarface74 on Friday October 18, 2019 @06:20PM (#21295530)
A quick Google search....

https://www.iphoneincanada.ca/iphone-5s/will-your-severed-fi...

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Re:The Pixel 4’s face unlock works on sleeping people by lonelappde on Friday October 18, 2019 @10:20PM (#21296405)
That spokespersons claim is plainly a lie though, refutable both in theory -- the given explanation is gobbledygook -- and in practice -- Chaos Computer Club has YouTube videos showing that fingerprint cloning works.
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Re:The Pixel 4’s face unlock works on sleeping people by scarface74 on Saturday October 19, 2019 @10:08AM (#21298554)
And that “proof” is of a first generation Touch ID, and unless you can find a reliable citation showing where a dead finger would work, how do you know it’s “gobbledygook”?

From a practical standpoint, if someone was willing to cut off your finger, wouldn’t it be easier to just force you a gunpoint to unlock your phone? Someone who really wanted what’s on your phone bad enough to try the “unreliable” hack, would just force you to unlock your phone or give up the password.

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