Austrian police say they are investigating a surge in bomb threat extortion attempts after numerous companies received bitcoin-seeking blackmail emails Tuesday morning.
- Austria's Federal Criminal Police responded with vehicle patrols in Vienna and Tyrol but found no evidence of bombs. They assume the anonymous senders are international.
- Police said bitcoin bomb threats are a "well-known mass phenomenon," even if Tuesday's reports represented an unusual uptick.
- The incident is a stark reminder of cryptocurrency's appeal to criminals, owing to the irreversibility of transactions and the absence of any third party who can veto them. The flip side is the public audibility of blockchains can help law enforcement track down perpetrators after the fact.
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