Study Finds Detectable Bitcoin Privacy Protocol Usage Below 1%
A longitudinal academic study found that several detectable Bitcoin privacy protocols together remained a small share of network activity, while visible use declined after major regulatory events.
Researchers Ben Hawkins, Joshua Levett, and Siamak F. Shahandashti published “No Country for Old Privacy,” a longitudinal measurement study of detectable privacy techniques on Bitcoin. The paper examined CoinJoin, CoinSwap, CoinShuffle, and stealth-address patterns using heuristic filters applied across blockchain history. The authors identified millions of transactions matching some of those heuristics, but reported that detectable use of the studied protocols remained below 1% of Bitcoin transactions.
The study mattered because Bitcoin privacy is difficult to measure precisely: stronger privacy often makes activity less visible to researchers. The authors therefore did not claim that less than 1% of users sought privacy. Instead, they concluded that the on-chain footprint of recognizable privacy protocols was small and had declined around regulatory pressure, suggesting that some privacy-seeking activity may have migrated toward methods their heuristics could not identify. That limitation is central to the result rather than a footnote.