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The Enigma machines and the breaking of the Enigma code were not the main determinants of the outcome of World War II, but did contribute to the outcome. There were only a few types of Enigma machines, so they had to be capable of using different encryption keys. If machines used the same encryption key for message after message, the encryption would be ...


6

Yes, they do allow multiple keys. Typically they had a new key every day. See this Wikipedia article: Though Enigma had some cryptographic weaknesses, in practice it was German procedural flaws, operator mistakes, laziness, failure to systematically introduce changes in encipherment procedures, and Allied capture of key tables and hardware that, during ...


6

"Allies" capturing Engima machines (what you really mean was British navy, who then in Hollywood were magically transformed into US navy) was really of no importance. What was important was capturing code books. The wiring of the Enigma machine was known since the 1930s, when Polish mathematicians managed to reconstruct it from very limited information. ...


2

I think Radio was more revolutionary - is was the first free (advertiser-paid) real time one-to-many not requiring any skills from the recipient (illiterates can listen) not requiring recipient to withdraw form menial tasks (one can work on a sewing machine while listening - TV actually does not have this feature!) information distribution system. The ...


1

The first Enigma machine to come to the notice of Germany's foes was in Poland, around 1928. Polish customs (and their intelligence service) were suspicious of the German embassy's unseemly desire to get a certain package out of Customs on a Saturday. The Poles spent the weekend copying the manuals and examining the mechanism, and then delivered it in the ...


1

See article II of the Treaty of Ghent, ending the War of 1812. http://war1812.tripod.com/treaty.html It lays out a series of delay times for many different parts of the world for the terms of the Treaty to come into effect.


1

I'd say that accounting for propagation delay explicitly with the day + n method is the exception rather than the rule. The most common accounting for this is to consider the law/edict in effect only when it is officially received. Thus the process goes like this: After drafting the edict, the sovereign signs or seals an edict, indicating authenticity and ...


1

In general, a commoner would address a gentleman as "Monsieur" and a lady as "Madame". Among nobility the practice would be the same, although the king is addressed as "sire". If a person was a servant of someone else they may use a special term of subservience. For example, in the play Le Cid (1637) by Corneille, when the page addresses his mistress he ...



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