Hey! Since I’ve read https://electriccoin.co/blog/encrypted-memo-field/ a few years ago I was intrigued with some ideas… Finally I started to play with it https://code.kripto.solutions/kripto/sentinel while developing https://forum.zcashcommunity.com/t/moeda-casa-smart-brazilian-fiat-to-crypto-over-zcash/38123
More to come!