In 2012 “Russian hacker” Yevgeniy Nikulin breached the internal networks of LinkedIn, Dropbox, and Formspring, and then sold their user databases on the black market, reports ZDNet. (He stole 117 million login codes, according to Bloomberg.) Nikulin was arrested in 2016 (while on vacation in the Czech Republic), and after an extradition battle spent years in U.S. prisons while awaiting his…