Many in the Bitcoin community seek increased financial privacy. As I wrote in a 2014 study of the Bitcoin ecosystem, “Bitcoin can facilitate more private transactions, which, when legal in the jurisdictions where they occur, are the business of nobody but the parties to them.” That study identified “algorithmic monitoring of Bitcoin transactions” as a rather likely and somewhat consequential threat to the goal of financial privacy (pg. 18). It was part of a cluster of similar threats.
Good news: The Bitcoin community is doing something about it.
The Open Bitcoin Privacy Project recently issued the second edition of its Bitcoin Wallet Privacy Rating Report. It’s a systematic, comparative study of the privacy qualities of Bitcoin wallets. The report is based on a detailed threat model and published criteria for measuring the “privacy strength” of wallets. (I’ve not studied either in detail, but the look of them is well-thought-out.)
Reports like this are an essential, ecosystem-building market function. The OBPP is at once informing Bitcoin users about the quality of various wallets out there, and at the same time challenging wallet providers to up their privacy game. It’s notable that the wallet with the highest number of