Cryptology I.5 Rotor Machines Machine Ciphers—Mechanic and Electro-Mechanic

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Contents

1. One-rotor ciphers
2. Mathematical description of rotors [PDF]
3. Cryptanalysis of one-rotor ciphers
4. Rotor machines [mathematical part as PDF]
5. The control logic of a rotor machine [mathematical part as PDF]
6. Historical rotor machines
7. Historical data on cryptanalysis
8. Cryptanalytic approaches to rotor machines [mathematical part as PDF]
   • Superimposition: Example
   • Isomorphs: Example
   • Ciphertext-only: Example

Here is the (in-) complete PDF version.