Comment Puzzles -- Dwork & Naor, 1992 (Score 1) 342
btw, The idea was published in 1992:
C. Dwork and M. Naor. Pricing via processing or combatting junk mail. In Advances in Cryptology---CRYPTO '92, Springer-Verlag Berlin Heidelberg 1993
See also papers that site it.
C. Dwork and M. Naor. Pricing via processing or combatting junk mail. In Advances in Cryptology---CRYPTO '92, Springer-Verlag Berlin Heidelberg 1993
See also papers that site it.
