Depends on your threat model. You cannot, under any circumstance, prove (mathematically) that a peer is the only controller of a private key.
Again, I would love to know if I'm wrong.
The fact that no publicly disclosed threat actor has been identified says nothing.
Re:A privacy VPN you can verify
by doublerebel on Saturday August 16, 2025 @02:57AM
(#44920915)
Proving a negative that information has not been shared has been a challenge from the beginning of information.
Are you suggesting a solution for this situation?
The final signature comes in the form of a x509 cerificate signed with ECDSA.
What's more important to me is that SGX still has a lot of security researchers attempting (and currently failing) to break it further.