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Big Barry Bitcoin · 39w
Is this really your fingerprint or just a random key generated and stored in the secure element? If I delete and re-register my fingerprints with say my thumb, will it still work? will it work with m...
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dolu @dolu
It's neither your actual fingerprint nor a random key - it's more complex. When you create a passkey, your device generates a random private key and stores it in the secure element. Your biometric (fingerprint/face) is just the unlock mechanism for that key, not the key itself.

⚠ So if you delete and re-register a new passkey, you will not be able to restore your old private key!
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Big Barry Bitcoin · 39w
So it's a random key, I think the nuance you are trying to make is that the key is created and kept in the secure element. My follow up to that would be this: AFAIK, you cannot do SECP256K1 on these secure elements. So how do you secure the key and use it? AFAIK, usually you create a key in the s...