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by bcaa7f3a8bbc 2610 days ago
> I'm much more likely to lose a random keycard

On this example, I don't think it's a problem as well. First, the keycard has a PIN. After 3 failed attempts, it would either self-destruct the private key or lock itself down until a secret recovery code is provided. Second, private keys on keycards that are reported as lost can be revoked immediately.