On the Security of Blind Signature and Partially Blind Signature
Blind signature allows a user to obtain a signature from an authority on any document, in such a way that the authority learns nothing about the message that is being signed. The blindness is an important property which distinguishes the blind signature from other signature schemes. Partially blind signature is an extension of blind signature that allows a signer to sign a partially blinded message that include preagreed information in the resulting signatures. Recently, Liao et al. proposed a pairing-based provable blind signature scheme without random oracles, and Hu et al. proposed an efficient ID-based partially blind signature scheme with security proof. But in this paper, we show that the two schemes do not satisfy the blindness and partially blindness, respectively. Liao et al.s scheme is linkability and in Hu et al.s scheme, a malicious user can replace pre-agreed common information with a special information
c ryptography cryplanalysis blind signature partially blind signature bilinear pairings
Baoyuan Kang Jinguang Han
Computer Science and Software Institution Tianjin Polytechnic University Tianjin, China College of Science Hohai University Nanjin, China
国际会议
上海
英文
206-208
2010-06-22（万方平台首次上网日期，不代表论文的发表时间）