"Robert G. Brown" wrote: > > Work and time burdens are not uniform or static because of Moore's law > [snip] What? Gimme a break. I can impose the exact time burden I want at each s step in a protocol -- I simply do not reply before the time I want elapses. This is SOP in any attack protection or congestion-control toolbox. There is NO Moore's law here. Work burden, when well-engineered with a time burden, can also certainly be added specifically when desired and without penalizing everyone. For example, work burden can be demanded when a message has a non-verifiable envelope --- it will NOT burden senders that have verifiable envelopes. Regards, Ed Gerck