Cryptanalysis of Two Provably Secure Blind Signature Schemes
Shangteng Huang · 2008
Recently,Liao et al.proposed one pairing-based blind signature scheme that is provably secure in the standard model,and Chen et al.proposed one restrictive blind signature scheme that is provably secure in the random oracle.In this paper,security analysis of the two schemes is given,and their insecurity is pointed out.Both Liao et al.'s scheme and Chen et al.'s scheme don't satisfy the unforgeability property.At the same time,Liao et al.'s scheme also doesn't satisfy the blindness property and Chen et al.'s scheme doesn't satisfy the restrictiveness property.