[shuntress]

And "Real Apple Hardware" supporting "Real Apple ID" on every device in the network.

[samatman]

Cryptographic signatures can be decoded by anything which has the public key, that's not how this would work at all.

[illiac786]

Cryptographic signatures are _meant_ to be decoded and verified.

If you want to take a signature you need to extract a secret key from an iPhone in this scenario, which would be probably stored in the secure enclave.

That's how asymmetric cryptography works.