An efficient blind signature scheme for information hiding

This paper presents an efficient blind signature scheme under which informa tion can be hidden in the signature and uncovered later for security purpos es. When it is applied to an untraceable electronic cash system, cash owner s are able to claim and identify lost cash; when applied to an anonymous el ectronic voting protocol, no election results are revealed until the entire voting process is finished. The additional computation for the proposed sc heme, as compared with typical blind signatures, consists of just two hashi ng operations.