Sébastien Kunz-Jacques Gwenaëlle Martinet Guillaume Poupard Jacques Stern Cryptanalysis of an Efficient Proof of Knowledge of Discrete Logarithm. 27-43 2006 conf/pkc/2006 Public Key Cryptography http://dx.doi.org/10.1007/11745853_3 db/conf/pkc/pkc2006.html#Kunz-JacquesMPS06