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3 entries
Astrophysicist at Indiana University who posted on the cryptography list (Jan 17, 2009), raising concerns about government regulation and botnet exploitation — an early substantive Bitcoin critique.
Astrophysicist Jonathan Thornburg raises concerns: no major government allows untraceable international transfers, and a million-node botnet could move $100K at 10¢ each.
John Levine dismisses Bitcoin's security assumption — botnet operators control 100,000+ machine zombie farms, and hashcash failed for the same reason: bad guys outweigh good guys computationally.