As long as honest nodes control the most CPU power on the network, they can generate the longest chain and outpace any attackers.

But they don't. Bad guys routinely control zombie farms of 100,000 machines or more. People I know who run a blacklist of spam sending zombies tell me they often see a million new zombies a day. This is the same reason that hashcash can't work on today's Internet -- the good guys have vastly less computational firepower than the bad guys. I also have my doubts about other issues, but this one is the killer. R's, John --------------------------------------------------------------------- The Cryptography Mailing List Unsubscribe by sending "unsubscribe cryptography" to majordomo@metzdowd.com ----- End forwarded message ----- -- Eugen* Leitl <a href="http://leitl.org">leitl</a> http://leitl.org ______________________________________________________________ ICBM: 48.07100, 11.36820 http://www.ativel.com http://postbiota.org 8B29F6BE: 099D 78BA 2FD3 B014 B08A 7779 75B0 2443 8B29 F6BE