Can you name a few such protocols? Your statement makes me very curious because as far as I'm aware, key distribution is the core problem of asymmetric cryptog

Can you name a few such protocols? Your statement makes me very curious because as far as I'm aware, key distribution is the core problem of asymmetric cryptography. I can generate a private key and say I'm you, and there's nothing stopping me from doing that. The only solution I'm aware of so far is DNSSec which starts from the operating system level.