TY - BOOK AU - Chaum David ED - Workshop on the Theory and Application of Cryptographic Techniques( 1987 : Amsterdam ) ED - Workshop on the Theory and Application of Cryptographic Techniques TI - Advances in cryptology : proceedings U1 - 5.82 PY - 1988/// CY - Berlin PB - Springer Verlag KW - Computer science KW - Cryptology ER -