# Trostle-Parrish: A somewhat homomorphic cryptosystem


TrostleParrish implements a somewhat-homomorphic cryptosystem outlined by [1] and [2]. Designed for efficient encryption in a PIR scheme.

This library is a work in progress, unvetted, unaudited. Please do not use this unless you understand the risks of doing so.


* [1] Trostle, Jonathan, and Andy Parrish. "Efficient computationally private information retrieval from anonymity or trapdoor groups." International Conference on Information Security. Springer, Berlin, Heidelberg, 2010.
* [2] Mayberry, Travis, Erik-Oliver Blass, and Agnes Hui Chan. "PIRMAP: Efficient private information retrieval for MapReduce." International Conference on Financial Cryptography and Data Security. Springer, Berlin, Heidelberg, 2013.