Hebern 1 rotor cipher machine, challenge

Introduction

In 1917, the American Hebern invented a cipher machine, the encryption element of which was a rotor. Hebern (simultaneously with Scherbius) invents the Rotor as a ciphering element.

If you want to check your mastery of the operation and cryptanalysis of the Hebern 1 rotor machine, you can try to solve the challenges that I have made available on my website: Challenge

There you will find problems similar to those given on the page bible, but with one important difference: the solution is not provided!

Problems

The 1st Problem

This problem is not difficult.... Except that it is necessary to create a simulator of the Hebern machine (paper or computer). To achieve this goal, one must have carefully read the text accompanying the problem.

The 2nd problem

The rotor position and the cipher mode are unknown. You can try all message keys.

The 3rd problem

You don't know the rotor wiring. On the other hand, you know the plaintext of an encrypted message. You need to find the plain of a second message.

The 4th problem

You don't know the rotor wiring. On the other hand, you know the plaintext of an encrypted message. You need to find the plain of a second message.

But unlike the previous problem, the cabling on the keyboard side does not correspond to the identity permutation. Conversely the Lampboard correspond to identity permutation.

The 5th problem

This challenge it is very close to the last one. The keyboard permutation corresponds to the identity but this is not the case for the Lampboard.

You don't know the rotor wiring. On the other hand, you know the plaintext of an encrypted message. You need to find the plain of a second message.

The 6th Problem

You don't know the rotor wiring. On the other hand, you know the plaintext of an encrypted message. You need to find the plain of a second message.

But unlike the previous problem, the cabling on the keyboard side and the lampboard side does not correspond to the identity permutation.

The 7th Problem

This challenge is very complex. You have no help. I give you only the cipher text. Happily, the keyboard and lampboard are both the identity permutation.

The 8th Problem

This challenge is very similar to the last one but the cryptogram is shorter.

The 9th Problem

This challenge is very complex. I give you only the cipher text. It is even more complex than the last challenge because you don’t know the keyboard permuation (the lampboard one is equal to the identity permuation).

The 10th Problem

You don't know the rotor wiring. On the other hand, you know the plaintext of an encrypted message. You need to find the plain of a second message.

The cabling of the keyboard corresponds to the identity permutation. the wiring of the lampboard is unknown.

The 11th Problem

For this challenge, all wiring are unknown. On the other hand, you know the plaintext of an encrypted message. You need to find the plain of a second message.

The 12th Problem

For this challenge, the rotor wiring is known as well as that of the keyboard (equal to the identity), but the lampboard is unknown. In addition we know the beginning and some cribs.

The 13th Problem

For this challenge, the rotor wiring is known but the other wiring are unknown.

The 14th Problem

This challenge is very complex. I give you only the cipher text. It is even more complex than the last challenge because you don’t know the Lampboard permuation (the keyboard one is equal to the identity permuation).

The 15th Problem

This challenge is very complex. I give you only the cipher text. It is even more complex than the last challenge because you know nothing (lampboard, rotor, keyboard).

The 16th Problem

This challenge is very complex because you know nothing (lamboard, rotor, keyboard) . I give you only the cipher text. It is less complex than the last challenge because the cryptogram is very long.