A 27-Year-Old Codebreaker Busted the Myth of Bitcoin's Anonymity

Thanks in large part to the mathematician who's the subject of the article, set in and before 2013.

Straight from the horse, PDF: https://cseweb.ucsd.edu/~smeiklejohn/files/imc13.pdf

The original article is not about the anonymity in the blockchain per se, but about the first person who made it explicit and published papers describing it, over "a decade" ago.