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[+] 116 points 1 year ago (2 children)
  • [–] 109 points 1 year ago (6 children)

    “Easy”

    Like 4 countries had to work on it.

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  • [–] 89 points 1 year ago (5 children)

    And invention of a new computer that was much faster than anything else at the time.

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  • [–] 43 points 1 year ago* (last edited 1 year ago) (4 children)

    The Bombe machines used to decipher Enigma are usually described as being electro-mechanical devices. Perhaps you could argue they were special-purpose computers of a sort, but definitely not the programmable, general-purpose machines most people think of when they hear the word "computer".

    The first programmable electronic computer was developed at Bletchley Park, but it wasn't used to decipher Enigma.

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  • [–] 9 points 1 year ago (3 children)

    Damn fancy Babbage contraptions all look the same to me.

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  • [–] 5 points 1 year ago (2 children)

    Really? One relies on rotors and the other one relies on rope memory and vacuum tubes.

    It's like comparing a sparkplug with a motor controller in my mind

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  • [–] 73 points 1 year ago (21 children)

    Similar story.

    The US Air Force designs the SR-71 Blackbird to be the ultimate spy plane. It's meant to be undetectable and untraceable.

    Some general demands they paint USAF in big letters on the side.

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  • [–] 60 points 1 year ago (7 children)

    The SR-71 wasn't all that stealthy. Its main defense was that it moved too high for flak and too fast for SAMs. It was retired when interception capabilities improved to match it.

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  • [–] 24 points 1 year ago* (6 children)

    It was at least partially retired because some Asshat General decided that since the USAF has multi role attack airframes, that we didn't need recon aircraft anymore. As far as I can tell the only viable threat to the planes were SAAB Viggens.

    I'm not salty. You're salty.

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  • [–] 13 points 1 year ago (4 children)

    Eh the use of recon aircraft has been fairly outdated with satellites and remote aircraft

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  • [–] 7 points 1 year ago (3 children)

    the problem with sattelites is that they have to be on a predictable course. any opponent able to reach space can destroy them. the communication to remotely piloted aircraft can also be jammed as part of an attack. it's why they could use an astro-inertial navigation system on the SR-71 that could not be jammed and would allow the pilot to sway from the planned course, but also go back on course. i can't believe they retired it. it closed a gap.

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  • [–] 3 points 1 year ago (1 child)

    Yeah the NRO satellites really make me doubt that. $2-$6b satellites capable imaging the sunlit side of the planet every 90 minutes would be a stupid expense if any country could just shoot them down.

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  • [–] 10 points 1 year ago (4 children)

    Hm, I like the story of the U-2 better, in which Kelly Johnson, the plane's designer, tells the CIA the Soviets won't be able to shoot it down BUT that they are massively ramping up their capabilities and will have caught up by 1960. The plane was eventually shot down on May 1, 1960 to the great embarrassment of president Eisenhower.

    Happy May Day, Mr. Krushchev!

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  • [+] 2 points 1 year ago (3 children)
  • [–] 7 points 1 year ago (3 children)

    Source? I did a quick websearch and didn't see anything on that

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  • [–] 2 points 1 year ago (2 children)

    It's true. Im actually the guy who painted the letters on the planes!

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  • Except that the signoff with the same phrase every time was made up to dramatize the movie. They did often have predictable messages, like including the time & a weather report, which allowed crib dragging to work by guessing which of a few possibilities had been transmitted.

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  • [–] 34 points 1 year ago (3 children)

    Even without the sign off, from what I remember from the movie (so take it with a grain of salt), they reported the time and weather every morning. That’s formulaic enough to make it a little easier too.

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  • [–] 13 points 1 year ago

    The timing of that weather report was also crucial, as the code changed daily. Getting that report in the morning allowed them to crack the code, and then use that to decode messages for the rest of the day.

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  • [–] 12 points 1 year ago (1 child)

    Yeah, isn't the thing about the sign-off a dramatization? They sure did repeat certain words like OKW and BdU, as well as sending uniform weather reports and changing their settings too infrequently. But that bit sounds fabricated.

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  • [–] 13 points 1 year ago

    Exaggerated, but not fabricated. There were common sign offs, and messages like "nothing to report" that were seen often. Another example is an officer who started every message with the same long formal greeting when messaging their commander. The most common was messages starting with "to " (in German and written for transmission, so "ANX" was the actual plaintext).

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  • [–] 33 points 1 year ago (5 children)

    And that is why you make sure your encryption algorithm allows for a letter to be one itself after encryption.

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  • [–] 5 points 1 year ago (4 children)

    If we send it back though the encryption mechanism, it's like double encrypted, duuude.

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  • [–] 21 points 1 year ago

    15 or so years ago our local historical library had a code breaking challenge - it had all sorts of classic ciphers including that the polyalphabetic substitution one similar to Enigma's. And the texts themselves were mostly your mama jokes in Yoda speak (because the librarians are assholes) and I can't describe the deflating feeling of spending a good couple of hours or so to decrypt YO MAMA SO FAT.

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  • [–] 20 points 1 year ago

    We're clean on opsec

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  • [–] 18 points 1 year ago

    Fascists are fucking idiots.

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  • [–] 11 points 1 year ago

    “Thank you for your attention to this matter.”

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  • [–] 10 points 1 year ago (6 children)

    I thought this was mainly because they intercepted the same message which was sent twice

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  • [–] 39 points 1 year ago (1 child)

    It's slightly "way more complicated". They occasionally forgot to update the key settings between messages, resent identical messages with different keys or encryption systems, or just chose easy to guess keys.

    There was also a defect in enigma where no letters could be encoded as themselves. This meant that you could use knowledge of what was likely in a message at a certain location to rule out keys, since any letters in common disqualified the guess.

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  • [–] 9 points 1 year ago (2 children)

    I believe that was Lorenz, not enigma. The higher level code. Basically Hitler and his generals only.

    An operator missed a letter in a message. He then reset the machine and re-encrypted it. 2 almost identical messages like that were enough to figure out how the encryption operated. They didn't see a physical Lorenz machine till after the war.

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  • [–] 7 points 1 year ago* (last edited 1 year ago)

    The HH at the end didn’t necessarily help crack the code, it was a trick that could be tried once in a while to see if the radio agent on the other end had been compromised. “Heil Hitler” was such an automatic response for German radio operators that they would sometimes automatically “HH” if one was sent to them and they were faking being an allied agent.

    Regarding WW2 and cryptography, I Highly recommend Between Silk and Cyanide by Leo Marks. Well written, easy read, dry British humor, and a real view into the British cryptography development, deployment of agents behind enemy lines, and the price that was paid. Can’t recommend it enough.

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  • [–] 3 points 1 year ago

    I really need to watch The Imitation Game.

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  • [–] 3 points 1 year ago

    Nah. Known plaintext wouldn't help cracking a good encryption scheme. Enigma was not a great encryption scheme. It had a few fatal flaws.

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  • [–] 2 points 1 year ago