Cryptanalysis of Liao et al.'s Blind Signature Scheme from CIS'05
Yongjian Liao, Qihang Wang · 2007
Liao et al. proposed first blind signature schemes without random oracles from pairings and provided security proofs in CIS’05. However, we show that their blind scheme is neither blind, nor unforgeable, anyone not to query the signing oracle can forge signature of any message.