I don't regard the Declaration of Independance as uncivilized. Its the dressing up as Indians and dumping some guy's tea into the harbour that was uncivilized!
Anyway, it looks like the Xine coders carefully avoided any Patent or Copyright infringements so the result is legal, even your side of the pond.
The Enigma was based on patents by Hugo Koch but the machine was named and developed by an engineer named Arthur Scherbius. It was sold to banks and other companies in the 1920s. The British and other allied companies would have obtained examples of these commercial machines.
The German military adopted a modified version, during the 1930s and 1940s there were several important changes to the design and operation of the machine.
A trio of brilliant Polish codebreakers, including Rejewski, developed some techniques which enabled them to work out the encryption keys used by some of the German communications networks. Just prior to the invasion of Poland, changes in German operating procedures eventually rendered these techniques ineffective. The Poles did not have the resources to overcome these difficulties.
Changes included:
Ending the practice of encoding the message key twice in the preamble.
Better procedures for choosing the indicator settings.
Decreasing the validity of basic machine settings from quarterly to monthly to weekly to daily.
Adding extra wheels/rotors to the original three. Three from five were selected for insertion.
Adding a position for a fourth wheel in the Naval enigma.
The Enigma was never broken completely once and for all. The British had to start afresh every day in order to work out the day-code and message-codes for each German network.
Several times, changes in German procedures meant that existing codebreaking techniques no longer worked and new techniques had to be developed.
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I don't regard the Declaration of Independance as uncivilized. Its the dressing up as Indians and dumping some guy's tea into the harbour that was uncivilized!
Anyway, it looks like the Xine coders carefully avoided any Patent or Copyright infringements so the result is legal, even your side of the pond.
It was an Abwehr unit, serial G-312
No Plugboard
Described as "3 rotor" though the picture shows four.
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The German military adopted a modified version, during the 1930s and 1940s there were several important changes to the design and operation of the machine.
A trio of brilliant Polish codebreakers, including Rejewski, developed some techniques which enabled them to work out the encryption keys used by some of the German communications networks. Just prior to the invasion of Poland, changes in German operating procedures eventually rendered these techniques ineffective. The Poles did not have the resources to overcome these difficulties.
Changes included:
The Enigma was never broken completely once and for all. The British had to start afresh every day in order to work out the day-code and message-codes for each German network.
Several times, changes in German procedures meant that existing codebreaking techniques no longer worked and new techniques had to be developed.
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