Highly recommended for those interested in the mathematical framework of ciphers.
The book is systematically divided into two primary sections that cover the dual nature of the "secret science":
by Friedrich L. Bauer is widely considered a cornerstone text in the field of cryptology. Originally published in German as Entzifferte Geheimnisse , it evolved from lecture notes into a comprehensive English reference that balances historical narrative with rigorous mathematical analysis. Core Content and Structure Decrypted Secrets
– Dedicated to the art of "breaking" codes. It covers techniques like frequency analysis, periodicity examination, anagramming, and linear basis analysis. Key Strengths
Ideal as a classic reference work and supplementary text for university-level courses. Highly recommended for those interested in the mathematical
Excellent for those interested in the history of codemaking/breaking in the 20th century.
– Focuses on the creation of codes and ciphers. It details various encryption steps, including simple and polygraphic substitution, linear substitution, transposition, and polyalphabetic systems. Originally published in German as Entzifferte Geheimnisse ,
Decrypted Secrets: Methods and Maxims of Cryptology - Amazon UK