Generally speaking, highly qualified and deeply developed encryption libraries will have much more resistance to side-channel attacks. This resistance is someth

Generally speaking, highly qualified and deeply developed encryption libraries will have much more resistance to side-channel attacks. This resistance is something that is added to an implementation over time. The fact that a library implementing a cutting edge method has not matured this much yet is not really a surprise. Moreover, the fun parts of homomorphic encryption involve sending it to someone else who can process it. That someone else is probably not going to be able to measure your power draw. Though timing attacks can still be a worry.