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schrodinger
on Feb 17, 2016
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A Message to Our Customers
It sounds like it is built into hardware with newer iPhones containing the secure enclave, but not for an older phone like the iPhone 5C.
andreyvit
on Feb 17, 2016
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It's not really built into ‘hardware’, it's enforced by the Secure Enclave, which is software-based and accepts software updates signed by Apple. It's secure against kernel exploits and third-parties, but not against Apple.
thesmok
on Feb 17, 2016
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I'm really interested to know more about this. Does TouchId secure enclave really enforce the password attempt limits?
germanier
on Feb 17, 2016
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Yes, see page 12 here
https://www.apple.com/business/docs/iOS_Security_Guide.pdf
nly
on Feb 17, 2016
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root
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Its really a pretty impressive design. Android phones are lacking here.
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