No, the metadata would not be encrypted, so that you know which operations would be sensible. Just homomorphic encryption to do these operations without the sen

No, the metadata would not be encrypted, so that you know which operations would be sensible. Just homomorphic encryption to do these operations without the sender being able to decrypt the respective data. Don't have any particular use cases at hand though. Brightening an image without being able to decrypt it or something like that...?