Christian Jordan Howell and David Maimon report:
…. This trafficking of stolen data between producers, wholesalers, and consumers is enabled by darknet markets, which are websites that resemble ordinary e-commerce websites but are accessible only using special browsers or authorization codes.
We found several thousand vendors selling tens of thousands of stolen data products on 30 darknet markets. These vendors had more than $140 million in revenue over an eight-month period.
Read more at Ars Technica.