> This is addressed in https://signal.org/blog/private-contact-discovery/ https://signal.org/blog/private-contact-discovery/ – using Intel SGX, it's possible fo

> This is addressed in https://signal.org/blog/private-contact-discovery/ https://signal.org/blog/private-contact-discovery/ – using Intel SGX, it's possible for the clients to verify that the server is running the code it should be running Just the code inside the enclave and that's a very small amount of code, definitely not the entire server.