For those who trade in child sexual exploitation images and videos in the darkest recesses of the internet, cryptocurrency has been both a powerful tool and a treacherous one. Bitcoin, for instance, has allowed denizens of that criminal underground to buy and sell their wares with no involvement from a bank or payment processor that might reveal their activities to law enforcement. But the public and surprisingly traceable transactions recorded in Bitcoin’s blockchain have sometimes led financial investigators directly to pedophiles’ doorsteps.
Now, after years of evolution in that grim cat-and-mouse game, new evidence suggests that online vendors of what was once commonly called “child porn” are learning to use
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