Ahmad-Reza Sadeghi Michael Steiner Assumptions Related to Discrete Logarithms: Why Subtleties Make a Real Difference. 244-261 2001 conf/eurocrypt/2001 EUROCRYPT http://link.springer.de/link/service/series/0558/bibs/2045/20450244.htm db/conf/eurocrypt/eurocrypt2001.html#SadeghiS01