safeanswers. PloS one. 9(7):e98790. 2014. Cynthia Duork. Differential privacy. In Automata, languages and programming. pages 1-12. Springer. 2006. Jon Evans. Bitcoin 2.0: Sidechains and ethereum and zerocash. oh my!. 2014. Craig Gentry. Fully homomorphic encryption using ideal lattices. In STOC. volume