@misc{cryptoeprint:2010:358, author = {M.-F. Lee, N.P. Smart and B. Warinschi}, title = {The Fiat--Shamir Transform for Group and Ring Signature Schemes}, howpublished = {Cryptology ePrint Archive, Report 2010/358}, year = {2010}, url = {http://eprint.iacr.org/2010/358}, }