@book{1985-beth ,title={{Advances in cryptology: EUROCRYPT '84}} ,booktitle={{Advances in cryptology: EUROCRYPT '84}} ,editor={Thomas Beth and Norbert Cot and Ingemar Ingemarsson} ,ISBN={3--540--16076--0} ,MR={86m:94003} ,publisher={Springer-Verlag} ,address={Berlin} ,series={Lecture Notes in Computer Science} ,volume={209} ,year={1985} }