A provably secure restrictive partially blind signature scheme

Abstract

The concept of partially blind signatures was first introduced by Abe and Fujisaki. Subsequently, in work by Abe and Okamoto, a provably secure construction was proposed along with a formalised definition for partially blind schemes. The construction was based on a witness indistinguishable protocol described by Cramer et al. and utilises a blind Schnorr signature scheme. This paper investigates incorporating the restrictive property proposed by Brands into a partially blind signature scheme. The proposed scheme follows the construction proposed by Abe and Okamoto and makes use of Brands’ restrictive blind signature scheme.