Good morning everyone,  I thought it might interest some of you.  We have just released a paper and a proof of concept implementation of Zerocash on Ethereum.  The paper can be found here: http://arxiv.org/abs/1904.00905  The code can be found here: https://github.com/clearmatics/zeth  This is a proof of concept and many things need to be addressed (see paper and issues on the github repo) for more details on this.  Happy to get any feedback/comment.  Have a great day 🙂