Re:Face ID and Touch ID for the Web
by blintz on Wednesday June 24, 2020 @03:21PM
(#23632621)
Attestation. If a website requests it, the device will provide cryptographic proof that you used a specific vendor’s device to store the resident credential. The proof is a certificate signed with a vendor’s secret attestation key.
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Can't the key get stolen if it's on the client?
Yes, but it’s probably stored in the Secure Enclave, so it’ll be hard work.