If you do this, have at least one backup key (if need be on paper) or a guaranteed alternate path into the hosts you depend on this key to access. Because if the secure enclave is as good as we're told, if you lose access to ->THIS<- secure enclave, its game over for the keys.
Secure enclave protecting Keychain, the keychain is backed up. Not the contents of the enclave.
Too many failed access attempts? poof the key is gone. Could be as low as 10.
(happy to be corrected. This is what I gather from a quick read-around. I was a bit surprised the site didn't seem to discuss this)
Your backup key should also be in a secure enclave, just in a different secure enclave. Both keys should be accepted by the system.
The truly paranoid can multiple types of secure enclaves - TouchID for primary, a YubiKey for backup.
> If need be on paper
Your security is only as strong as its weakest link. Paper has a way of getting photographed, and the privacy of your key depends on your OCR software, unless you really want to painstakingly copy it in by hand, and even then, it turns into a file-based key on the filesystem, with all its attendant risks.
No, paper for cold storage has the advantage of requiring physical access. Not some virus or hacker breaking into your computer from hundreds of miles away. If you are living in the US, gun ownership provides additional security over this piece of paper at home.
It is not the piece of paper but the property it represents. If it is a Wallet with just as much as 1 Bitcoin on it, I would should you if you were trying to take it from me illegaly - also considering the fact that you are probably in my house without my consent, which one might argue doesn't even require me to have that piece of paper in my house.
If someone is looking for that particular piece of paper, they probably want it for reasons that distinguish it from the average piece of paper. Also, most defensive gun uses end without shots being fired, so "usually" nobody even has a bullet fired at them.
Secure enclave protecting Keychain, the keychain is backed up. Not the contents of the enclave.
Too many failed access attempts? poof the key is gone. Could be as low as 10.
(happy to be corrected. This is what I gather from a quick read-around. I was a bit surprised the site didn't seem to discuss this)