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comment by user-inactivated

Homeomorphic encryption is very cool, and Youssef Gahi and co have a scheme that sounds like it could work for a lot of applications, all those that can do everything they need to within a relational database, but you still have to commit to performing only certain operations on your data, and that's a pretty big risk for many applications (suddenly you really need a more tailored caching scheme, but you can't implement one with the operations you have). It's likely only every going to happen for every well-understood applications, and the big players would have to decide it was worth constraining themselves to provide that kind of security because there's no way "NetFlix, but with homeomorphic crypto!" or "Google, but with homeomorphic crypto!" are going to displace Netflix or Google if that's their only distinction.