Intel SGX - allows you to run your code on a someone’s hardware fully assured that owner can’t get nor your code not your data.

MPC - Multi-Party Computations. To protect your data and algorithms, you split data and code between multiple parties in special way that prevents them from knowing what exactly was computed.

https://en.wikipedia.org/wiki/Software_Guard_Extensions

https://en.wikipedia.org/wiki/Secure_multi-party_computation