wUF but not sUF signatures, called WoUF signatures in this paper, are investigated in this paper. It is found that by applying a generic construction to WoUF signatures with indirectly-signability and perfectly-unlinkability (also defined in this paper), we can regenerate many efficient group signatures in literature.
We also propose improvements to the group signature schemes of CL04, NSN04, KY05, in line with our generic construction.Category / Keywords: Digital Signature, Group Signature, Weakly Unforgeable Signature, Strongly Unforgeable Signature. Date: received 1 Mar 2007, withdrawn 30 Mar 2007 Contact author: zhousujing at is iscas ac cn Available format(s): (-- withdrawn --) Note: Welcome for any comments. Version: 20070330:070712 (All versions of this report) Short URL: ia.cr/2007/080 Discussion forum: Show discussion | Start new discussion