@misc{cryptoeprint:2005:098, author = {Yassine Lakhnech and Laurent Mazare}, title = {Probabilistic Opacity for a Passive Adversary and its Application to Chaum's Voting Scheme }, howpublished = {Cryptology ePrint Archive, Report 2005/098}, year = {2005}, url = {http://eprint.iacr.org/2005/098}, }