Regarding feasibility & cost, what do you think of the old '"Proof-of-Work" Proves Not to Work' paper? [1] From what I remember, the time to hash adequately would be too long to be of practical use/benefit.
[1] http://www.hashcash.org/papers/proof-work.pdf
Regarding feasibility & cost, what do you think of the old '"Proof-of-Work" Proves Not to Work' paper? [1] From what I remember, the time to hash adequately would be too long to be of practical use/benefit.
[1] http://www.hashcash.org/papers/proof-work.pdf