00000nam a2200000 a 4500 20251203092048.0 0883856220 005.82,D,sin _ Sinkov, Abraham Elementary cryptanalysis a mathematical approach Washington D.C. The mathematical association of America 1966 ix,222p. 23 cm. New Mathematical library Cryptanalysis Polygraphic systems Irwin, Paul L. ENGLISH 005 BOOK _ 89463 LIBSC C 62585 62585 0 0 0 0 PU PU 1999-02-02 12.95 1 005.82,D,sin _ 89463 2026-08-19 10:30:29 2026-07-23 BK