Zcash, Monero, Mimblewimble: How to make blockchains untraceable

We're happy to welcome Paige Peterson, community manager for Zcash (https://en.wikipedia.org/wiki/Zcash), and Justin Smith who's working with Monero (https://en.wikipedia.org/wiki/Monero_(cryptocurrency)). You've probably heard that public blockchains as used in Bitcoin and Ethereum are not as anonymous and untraceable as often reported in the context of the "darknet", Silk Road, and similar topics. And you may be aware that while crypto-currencies themselves don't care about your real-world ide…