Victor Boyko Marcus Peinado Ramarathnam Venkatesan Speeding up Discrete Log and Factoring Based Schemes via Precomputations. 221-235 http://link.springer.de/link/service/series/0558/bibs/1403/14030221.htm 1998 EUROCRYPT db/conf/eurocrypt/eurocrypt98.html#BoykoPV98