IaaS: Only if you do TLS termination at their gateway, otherwise not really, they'd need to get into your operating system to get the keys which might not always be easy. They could theoretically MITM the KVM terminal when you put in your disk decryption keys but that seems unlikely.
FaaS: Yes.
IaaS: Only if you do TLS termination at their gateway, otherwise not really, they'd need to get into your operating system to get the keys which might not always be easy. They could theoretically MITM the KVM terminal when you put in your disk decryption keys but that seems unlikely.