\bib{1986/pichler} \yr 1986 \isbn 3--540--16468--5 \mr 87d:94003 \editor Franz Pichler \book Advances in cryptology---EUROCRYPT '85: proceedings of a workshop on the theory and application of cryptographic techniques (EUROCRYPT '85) held in Linz, April 1985 \series Lecture Notes in Computer Science \seriesvol 219 \publ Springer-Verlag \endref