Questions tagged [secrecy]

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Where can I find a picture or physical description of the A3 scramble telephone system?

Who has a picture or physical description of the A3 scramble telephone system, which was used for speech privacy by Roosevelt and Churchill between 1940 and 1943. The system was most likely located ...
user avatar
49 votes
3 answers

Why were the Allies so much better cryptanalysts?

When I read about World War II, more specifically about the use of cryptography in that war, I get the impression that the Allies were much more successful in breaking the enemy codes than the Axis ...
José Carlos Santos's user avatar
33 votes
2 answers

Why did Roosevelt and Churchill use voice-based telecommunication, instead of simpler text-based options which were easier to encrypt?

Roosevelt and Churchill used an extremely sophisticated telephone encryption system, SIGSALY, to communicate during WWII. In fact, they did not use it all the time because apparently it changed the ...
J Fabian Meier's user avatar
30 votes
5 answers

Biggest successful secret project in history?

Many conspiracy theories rely on a powerful organisation (government agencies, secret societies, etc.) hiding the truth from public view. A prime example are alien conspiracies. To the known record, ...
Rexcirus's user avatar
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37 votes
4 answers

Why were the drawings of Colossus burnt after WW2 and why was its very existence "of course" kept secret?

After VJ Day, suddenly it was all over. Eight of the ten Colossi were dismantled in Bletchley Park. Two went to Eastcote in North London and then to GCHQ at Cheltenham. These last two were dismantled ...
Cordaryl's user avatar
  • 379
72 votes
4 answers

Did ancient peoples ever hide their treasure behind puzzles?

I just saw the film Dora and the Lost City of Gold, in which there is a somewhat meta running commentary over whether so-called "jungle puzzles", intellectual challenges typically requiring explorers ...
Robert Columbia's user avatar
  • 3,524
3 votes
0 answers

By when was the Manila galleon well known?

Spain managed to start up the Manila galleon system in the 1560s, linking the Philippines with Mexico. The Spanish crown used its control of non-free labor in New Spain to extract precious metals. On ...
Aaron Brick's user avatar
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