Surprisingly, there are a few ways in which you can perform operations on encrypted data: https://en.wikipedia.org/wiki/Homomorphic_encryption https://en.wikipe

Surprisingly, there are a few ways in which you can perform operations on encrypted data: https://en.wikipedia.org/wiki/Homomorphic_encryption https://en.wikipedia.org/wiki/Homomorphic_encryption However, the best techniques we have for doing so are many orders of magnitude slower than their un-encrypted counterparts, so it's not feasible today.