U.S. Army Guide to Code Breaking
sebFlyte writes "From the introduction of this document, the U.S. Army's field manual guide to Cryptanalysis: 'This manual presents the basic principles and techniques of cryptanalysts and their relation to cryptography. Cryptanalytics is the art and science of solving unknown codes and ciphers.'"
We already all about the Cryptonomicon here.
I find it very annoying that the file is broken up into seperate PDFs, is there a tool to combine several PDF files into one large file?