Bitcoin's blockchain provides inalterable evidence, stored on thousands of computers, of every Bitcoin transaction that's ever taken place. Many of the transactions recorded on that distributed ledger are crimes: Billions of dollars in stolen funds, contraband deals, and paid ransoms sitting in plain sight, yet obscured by unidentifiable Bitcoin addresses and, in many cases, tangles of money laundering.
But a group of Cambridge cybersecurity researchers now argues that one can still distinguish those contraband coins from the legitimate ones that surround them, not with any new technical or forensic technique, but simply by looking at the blockchain differently—specifically, looking at it more like an early 19th century English judge.
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