TY - BOOK AU - Churchhouse, Robert TI - Codes and Ciphers: Julius Caesar, the ENIGMA, and the Internet SN - 9.78E+12 U1 - 652.809 PY - 2001/// CY - Cambridge PB - CUP KW - Ciphers KW - Cryptography KW - Mathematics KW - Science UR - http://isical.cambridge.patron.eb20.com/Collections/ViewBook/f1db9736-7e68-4b76-9ee0-c6628dbe2745 ER -