Enigma-M4

High school (ages 12+)
Science & Technology

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/enigma-m4

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the machine type?Four-rotor electro-mechanical rotor cipher machine (Schlüssel M Form M4)
2. What is the primary operator?German Kriegsmarine (Navy)
3. Why did the Germans add a fourth rotor to the Enigma machine?They wanted to make the machine’s codes stronger because earlier models could be broken. The fourth rotor added many more possible settings, so it took much longer to guess the right combination.
4. How does the Enigma-M4 send a coded message?When a key is pressed, electricity travels through the entry stator, the four rotors, a reflector, and back through the rotors, lighting a different letter on a lampboard. The order of the rotors, their starting positions, and the plugboard connections all change the final letter.

Rotor Cipher Machine: An electromechanical device utilizing rotating wheels (rotors) to perform complex letter substitutions for encryption and decryption.
Kriegsmarine: The official designation for the German Navy during the period of World War II.
Cryptanalysis: The process of analyzing and breaking encrypted messages or ciphers without prior knowledge of the key.
Permutations: The total number of ways items can be arranged or ordered, crucial in calculating cryptographic complexity.