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Apple iOS Fingerprint Scanner Has Security Limits
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melgross
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melgross,
User Rank: Ninja
8/1/2013 | 10:55:38 PM
re: Apple iOS Fingerprint Scanner Has Security Limits
In thinking about this some more, I realized something. From looking at the patents, it appears that this is capacitive in nature. The ridges of the fingers will generate a pattern of capacitance, which is what's being read. If this is the case, no fingerprint pattern will work if it isn't from a real finger, perhaps only a live finger.
Cjaer Wilson
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Cjaer Wilson,
User Rank: Apprentice
8/1/2013 | 6:47:07 PM
re: Apple iOS Fingerprint Scanner Has Security Limits
If one were to pick up their iPhone and look at it directly from a power save (screen dimmed mode) the first thing that needs to be done is depressing either the home button or power button. I'm not privy to the ultimate design, however it's pretty easy to see how depressing the home button could generate an near instant read, index and compare. I don't attempt to do it in a hurry, but for me to press to wake, swipe and then password is more like four seconds, and as melgross points out some of us occasionally miss-key which adds to more delay.

Another obvious potential use is as a hands-nearly-free authentication. A vehicle driver who stops at a light can easily grab a phone and press the home button with a thumb by touch, then use the hands free mechanisms to give voice commands and audio response for the rest of their needs (call/directions).

Finally, and most importantly to me, is the extra security layer allows for a much more secure NFC or other location based transactions. I hate carrying credit cards with my phone, the phone should be able to replace those cards.

Yes, the security could be bypassed. However compared to the current state it's a radical improvement (assuming the inclusion of credit card replacement). If someone finds my credit card they can use it until I cancel it. If someone finds my phone they are going to have to dust it for finger prints and then generate a dummy that the reader would accept. I wouldn't want it to be the security protocol for a nuclear launch, but it's enough of a pain that your average subway iPhone thief is not likely to achieve success. Apple is also large enough to get payment processors on board.

As to the wipe issue, all one has to do is slide your thumb off after the read. Sometimes we over think things.
melgross
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melgross,
User Rank: Ninja
8/1/2013 | 3:01:17 PM
re: Apple iOS Fingerprint Scanner Has Security Limits
This is a tough one to call. The sensor seems more sophisticated that what I've been seeing previously, even including Authentec's earlier versions for other companies.

The point with this is not just speed, but not needing to remember the number, which might seem easy, as it's only four numbers. But people do sometimes forget, or, as you pointed out, hit the wrong key, sometimes, several times in a row, particularly when in a hurry.

This should be more secure than a four digit pin. And, it's more for the casual thief, who won't want to bother figuring out a way around it. Removing a fingerprint from the phone may not work well anyway.

I would just prefer they used a forefinger instead, as that's how we tap our phones normally, but perhaps we'll get the choice as to which finger to use. I don't know how it could tell anyway.


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