[MagicalTux]

The SGX certificate is signed by intel and includes a certification of the hash of the code loaded in the secure enclave ("MRENCLAVE").

When the client connects to the server, the server presents a tls certificate that includes an attestation (with OID 1.3.6.1.4.1.311.105.1) which certifies a number of things:

- the TLS certificate's own public key (to make sure the connection is secure) - The enclave hash

It is signed by Intel with a chain of custody going to intel's CA root. It's not "just a magic number" but "a magic number certified by Intel", of course it's up to you to choose to trust Intel or not, but it goes a much longer way than any other VPN.