A Novel Group Signature Scheme based upon DLP
Sujata Mohanty, Banshidhar Majhi
Journal of Information Security Research, Vol. 3, No. 1, 2012.
DOI: 
Link: http://www.dline.info/jisr/fulltext/v3n1/2.pdf
Abstract:
This paper presents a novel group signature scheme based on the discrete logarithm problem. In this scheme the length of the signature is independent of the number of members of the group and it supports message recovery feature. In case, some members left the group or joins the group, the group signature remains valid. All valid signatures are traceable by only the group manager. Every member of the group has a pair of secret keys: one is generated by the member himself and the other is provided by the group manager. Neither the group manager nor any group members can produce a valid signature on behalf of a member. The proposed scheme provides signerâ€™s anonymity, i.e., the verifier can verify the group signature by knowing only the groupâ€™s public information. This scheme has wide applications in real life scenarios, such as, e-cash, eauction, press releases and secures electronic transactions.