I've just finished a module which allows users to generate and validate hashcash tokens.
Hashcash tokens are bitstreams which are hard to calculate, but easy to verify, and are therefore proof that the generator performed a certain amount of CPU work, and have been proposed as a solution to spamming. More on this webpage http://www.cypherspace.org/~adam/hashcash/ Digest::HashCash doesn't seem to be a good place, because it's not performing a digest Crypt::HashCash same problem, it's not doing crypto Mail::HashCash would work, except I can see non-mail releated uses. Hash::HashCash seems to be the least bad fit then. Any suggestions?
