Publisher's Synopsis
This manual presents the basic principles and techniques of cryptanalysts and their relation to cryptography. Cryptography concerns the various ways of protecting messages from being understood by anyone except those for whom the messages are intended. Cryptographers are the people who create and use codes and ciphers. Cryptanalytics is the art and science of solving unknown codes and ciphers. Cryptanalysts try to break the codes and ciphers created and used by cryptographers. This field manual covers the essentials of Cryptanalysis. Everything from medieval Arabic statistics to modern American comupting went into this Field Manual, thereby giving the reader a wide but deep view on the whole subject of cryptanalysis.
