FHE will probably take a while to become practical. Remember, the first schema was published only in 2009, which is very recent in cryptography standards.<p>Secure multi-party computation can achieve similar objectives (compute on encrypted data-sets), but is much more mature research-wise (first schema dates back to the 70s) and can be practical for large algorithms today. See <a href="http:&#x2F;&#x2F;enigma.media.mit.edu&#x2F;" rel="nofollow">http:&#x2F;&#x2F;enigma.media.mit.edu&#x2F;</a> (disclosure - I&#x27;m one of the founders)