As government scrutiny of cryptocurrencies has intensified over the last several months, concern has grown over the possibility of a two-tier market for cryptocurrencies that have a transparent ledger. On one side, there are “clean” coins that are held and disbursed by centralized exchanges that require identity documents to comply with government-mandated Know-Your-Customer (KYC) regulations. On the other side, there are “dirty” coins of a unknown provenance that may come from mixers, CoinJoin transactions, and peer-to-peer trading....

It is about time that I give a progress update on my CashFusion Red Team Phase One Flipstarter. As a reminder, the long term goal of CashFusion Red Team is to investigate any weaknesses in the CashFusion CoinJoin protocol and/or CashFusion user behavior and attempt to mitigate them. The main projects of Phase One are to improve the fusionstats.redteam.cash web app and release the rbch R package for statistical analysis of the BCH blockchain....