E-Book Overview
This book provides an excellent foundation for solving cipher systems. The text describes the fundamental principles of cipher solution plus use of the unilateral frequency distribution in the solution process is covered in some detail. Various unilateral and multilateral systems are carefully discussed. In addition, the text introduces the student to the solution of digraphic substitution ciphers, including the solution of the Playfair Cipher. Numerous problems are provided for solution by the student.
E-Book Content
MILITARYCRYPTANALYSIS PARTI With New Added Problems For The Student Pages Introductory remarks. ................................................... Fundamental principles .................................................. Frequencydistributions ................................................. Fundamental uses of the uniliteral frequency distribution ..................... Uniliteral substitution with standard cipher alphabets ........................ Uniliteral substitution with mixed cipher alphabets .......................... Multiliteral substitution with single-equivalent cipher alphabeta ............... Multiliteral substitution with multiple-equivalent cipher alphabets ............. Polygraphic substitution systems. ......................................... Concluding remarks..................................................... Appendix ............................................................. Index.. ............................................................... Analytical key for cryptanalysis ........................................... PROBLEMS ........................................................... l- 6 7- 10 ll- 17 18 26 27- 39 40- 56 59 62 63- 69 76 96 99-104 105-135 137-142 142 143-149 by William F. Friedman n From Aegean Park Press Page 1 Previous Page Home Next Page