The first copy to decipher Enigma

A graduate at the University of Cambridge, Hal Evans, created the first fully functional one ενός κυκλομέτρου – ένα μηχάνημα που κατασκευάστηκε στις αρχές της δεκαετίας του 1930 από Πολωνούς μαθηματικούς για να βοηθήσει στην αποκρυπτογράφηση μυστικών μηνυμάτων που έστειλαν οι Γερμανοί μέσω της μηχανής κρυπτογράφησης Enigma.

It is almost the same size as a very large laptop, but much heavier, with , διακόπτες και ρότορες δέκα κιλών. Η έκδοση του κυκλομέτρου του 21ου αιώνα βρίσκεται αυτή τη στιγμή στο σαλόνι του καθηγητή του Evans, Tim Flack, λέκτορα Ηλεκτρολόγων Μηχανικών στο Πανεπιστήμιο του Cambridge, ο οποίος διεξάγει κάποια .

Just like the original, Evans' cyclometer can generate a huge catalog of all the possible ways a plaintext could be translated from an Enigma ciphertext, the used by the Germans. The machine semi-automates the process of identifying the results of every possible solution to the Enigma code.

Demonstrating how the machine works from Zoom, Flack said that the cyclometer was an early example of cryptographic genius and that it played a huge role in the development of the Bombe by Alan Turing, which was used to "break" Enigma's German code. during World War II.

"Turing's Bomb came to a point where Polish methods were no longer sufficient because the Germans had increased security to such an extent that they no longer worked. But the people of Bletchley Park could not have done what they did without the information from the Polish cryptographers. "

The original Polish cyclometer was built by a team led by cryptologist Marian Rejewski in the 1930s in response to the threat of the first war with Germany. At that time, the Germans were already using the Enigma machine to communicate encrypted radio messages.

The Enigma protocol was based on a mechanism that contained the 26 letters of the alphabet. A sender enters the text into the machine, with each letter triggering another to operate a different one . The new text consisted of random characters and could be typed into the receiver's machine to convert the ciphertext into readable plaintext.

The mechanism that converted the plaintext into ciphertext consisted of a complex system of rotors, reflectors, and tables. An Enigma machine usually contains a set of three spindles, each of which can be set to one of the 26 letters of the alphabet. How the rotors were adjusted determined which will be lit to generate the cipher text.

In all, there were hundreds of thousands of ways to configure the machine before sending a message. This setting was the key to the message and was communicated by the sender to the recipient to decrypt the communications. To make things more difficult, the Germans would change the key very often, making communications through Enigma very powerful.

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Written by giorgos

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