In researching Chaumian eCash and cashu, I came across this video:
https://www.youtube.com/watch?v=VwMzNE1D3so&list=WL&index=2&t=3990s
wherein, he references this blog post, which is a great read.
At the end, he kinda suggests tying ecash to bitcoin, and this blog post is from 2012.
