Efficient Pseudorandom Generator Based on the DDH Assumption

R. R. Farashahi, B. Schoenmakers, A. Sidorenko,  “Efficient Pseudorandom Generator Based on the DDH Assumption”, PKC 2007, LNCS, vol. 4450, Springer-Verlag, 2007, pp. 426--441. http://www.springerlink.com/content/9438318k81r30312/