Delfs Hans Introduction to crytography Principles and applications Delfs Hans; Knebl Helmut - 3rd - Heidelberg Springer 2015 - xx;508p. cm. ISBN: 3697.2600000000002 Standard No.: 129304 Source: 177, 03/03/2016, Excel Book International Textual Subjects--Topical Terms: I I C Dewey Class. No.: D6,8(B),942, Q5