TY - BOOK AU - Delfs, Hans and Knebl, Helmut AU - Knebl, Helmut ; jt. auth. TI - Introduction to cryptography; principles and applications T2 - Information Security and Cryptography SN - 3540422781 U1 - 518.1 PY - 2002/// CY - Berlin PB - Springer-Verlag ER -