A former American IRS investigator responsible for some of the earliest dark market takedowns has been in Nigerian custody since February. Neither Nigerian nor the US authorities seem to be distinguishing Tigran Gambaryan from Binance, the company where he works.

Chinese hackers are stepping up their game, according to Nigel Inkster, the former director of operations for Britain’s MI6. He says they are taking on a new swagger in cyberspace and borrowing things from a familiar playbook: a Russian one.