Two Improved Partially Blind Signature Schemes from Bilinear Pairings

A blind signature scheme is a protocol for obtaining a digital signature from a signer, but the signer can neither learn the messages he/she sign nor the signatures the recipients obtain afterwards. Partially blind signature is a variant such that part of the message contains pre-agreed information (agreed by the signer and the signature requester) in unblinded form, while threshold blind signature distributes the signing power to a group of signers such that a signature can only be produced by interacting with a predetermined numbers of signers. In this paper, we propose a threshold partially blind signature scheme from bilinear pairings and an ID-based partially blind signature scheme, which are provably secure in the random oracle model. To the best of authors’ knowledge, we give the first discussion on these two notions. Key words: threshold partially blind signature, identity-based partially blind signature, bilinear pairings

• Type: Conference
• Year: 2005
• Where: ACISP
• Authors: Sherman S. M. Chow, Lucas Chi Kwong Hui, Siu-Ming Yiu, K. P. Chow
• Keywords: ACISP 2005, Blind Signature, Blind Signature Scheme, Security Privacy, Threshold Blind Signature