Currently homomorphic encryption is extremely limited and/or computationally expensive. The most efficient approaches let you do only one type of operation, wh

Currently homomorphic encryption is extremely limited and/or computationally expensive. The most efficient approaches let you do only one type of operation, which isn't sufficient for arbitrary code execution. Known approaches that allow general operations are expensive (if they are secure). See https://secure.wikimedia.org/wikipedia/en/wiki/Homomorphic_encryption https://secure.wikimedia.org/wikipedia/en/wiki/Homomorphic_e...