There are also proof-of-work solutions (as in, CPU time) along those lines. An analysis of that solution came to the conclusion it won't work as a standalone cu

There are also proof-of-work solutions (as in, CPU time) along those lines. An analysis of that solution came to the conclusion it won't work as a standalone cure-all, but might be part of a more sophisticated overall scheme. (contact me for pointers if you're interested)