John Friedlander Igor Shparlinski On the Distribution of Diffie-Hellman Triples with Sparse Exponents. 162-169 2001 14 SIAM J. Discrete Math. 2 http://epubs.siam.org/sam-bin/dbq/article/36174 db/journals/siamdm/siamdm14.html#FriedlanderS01