A government worker hit Cc instead of Bcc while inputting email addresses of people who had asked questions about the sale of 30,000 bitcoins confiscated from the now-defunct Silk Road black market.
The recipients were supposed to receive an FAQ, not see a list of potential competitors in the public sale.
The U.S. Marshals service is the federal agency assigned to carry out the auction of the bitcoins, originally seized by the FBI and now worth about $18 million.
Read the rest at ThreatWatch, our Nextgov’s regularly updated index of cyber breaches.