Alan Turing, Bletchley Park - Enigma and the Bombe 

Thx Mr S ! Nice vid, I had the privilege of seeing the Manchester machines in the 70s when I was a lad, they were in some rooms at UMIST and we got to see the old drum drive before we went and saw the massive platter drive like a washing machine and the whirring tapes ... A wonderful 6 weekends, all based on Turing's work 😊

One of the greatest breakthroughs in history What a bunch of hero’s, that team was.

At least Turing was finally given a Royal pardon, I guess 60 years late is better than never

I spent more than 2 hours trying to choose the right video to show to my wife about the Enigma, one that could told a great and engaging story while explaining accurately the technical details, and after plenty of videos with way more views, this one is by far the best of them. Why doesn't this have more views? It's a joy to watch!

Very interesting video!!!!!!!!!!!!

Excellent video, very educational..

Love it. Love it. LOVE IT. Good that you mentioned the sad reasons for Alan's demise. Simon Singh wrote a book back in the nineties called "The Code Book" which if you like this subject is a good read. There is only one bad thing I have to say about this video, sorry. NO mention of "The Guardian" crossword that was used to recruit codebreakers to Bletchley, which was the only reason I was able to make an educated guess at what your enigma encrypted code was.

All those uniselectors spinning reminds me of looking in through the telephone exchange window when we were kids.

Very cool Mr Sensible. Very cool!

This is one of the best videos you have done, Mr S. During basic RAF Officer training, we went to Bletchley. What an amazing experience. We all went knowing what had been achieved but having it explained made the achievements of Turing and the teams even more impressive. I've tried to explain to people how amazing their work and success was but I've never been able to explain it properly. You have nailed it here. Brilliant work! 👍

Nifty AF !

I can imagine visiting that museum. My wife would have to drag me out.

Went to Bletchley. Really good museum

I knew a lady who I believe worked at Bletchley during the war. She'd emigrated to Australia, where I knew her but she wouldn't talk about her time there, as she had obviously signed secrecy documents. The only things she would talk about was driving trucks but there was one photo of her standing outside Bletchley that she had. An amazing lady, sadly missed.

Amazing. I visited the museum about fifteen years ago and there was just a fraction of what is now on display. I must go back again.

More like this sir

Thanks for taking us along, Mr. S, and how cool to actually operate the Enigma machine! Bletchley Park an endeavor of genius and infinite patience, juxtaposed with heart-wrenching human drama.

"Is there a handle?" Mr Sensible clearly thinking about taking the Enigma with him when he leaves :D

Also your gift is one of the very first transistors! I would love to have that as well! 😉

Thanks for this other type of video! I would appreciate even more content of this type.

Well done Sir. A good video, going more into how the work was done.

Great video sir! Well done.

GREAT job, Mr. Sensible! I find this subject matter fascinating, and rather prescient. I'll gladly keep on with the funding to keep this up. Thanks so much!

I visited Bletchley Park several years ago, long before the computing museum was established there. I've been meaning to revisit, and I definitely will next year. When I visited, I bought a (very simplified) Enigma decoder disc, which allowed me to code and decode simple messages. I'm sure I still have it somewhere. Alan Turing's treatment should be a cause for shame in British politics and the judiciary at the time. BTW, love the t-shirt 😄

How did you know this is one of my favorite topics? THANX! ;-)

Awesome video! Thank you for posting.

Excellent video mr.sensible. 👍

So awesome! I love this kind of stuff!

very interesting - well done.

Thank you for this video Mr S. What a story. Should never be forgotten.

The first time I saw an enigma was when one was loaned from Bletchley to the Jersey War Tunnels, a location that would have likely housed an enemy enigma during the war.

Great job shining a light on Bletchley Park! It is only skimmed over in High School History (at least in the 1970's), and only slightly more in undergraduate History in Universities (again, in the 1980's). But I became familiar studying computer science. We learned all about The Turing Machine of course, still the basis of all modern computing (at least again in the 1980's while I was in school). As well as the Bombe Machine, which is also the basis of modern encryption. It's terrible that most people know little to nothing about the miracles that were accomplished at Bletchley Park. Also, if you haven't yet seen it; "The Pain of Progress" has an excellent episode as well. I would very much like to visit there one day.

The codebreaking and the basic function of both the Enigma and the Bombe are a fascinating story, but I admit the part that makes me all giddy it the the physical machines themselves. The Enigma is a gorgeous bit of design, and the Bombe machines are impressive not just for the scale and complexity, but also for the fact that they were designed and built from scratch under a deadline of "We need this yesterday". Thank you for sharing the tour with us, that was really neat!

Such incredible clever people

I can't comprehend the serious amount of thinking that went on in they rooms.. pure genius and vigilance of highest level. They seemingly shortened the war by 4years or something.they have my eternal thanks.

Very interesting

I've been waiting for this, and coincidentally watched The Imitation Game last night. Thanks Mr. S. 👌

I'm so going to make one of them bomb machines now... simple. 😊

What an absolutely fantastic show! I have never seen such a clear explanation of how the Enigma machine. 👍

Wow what a video Mr S!!! Incredible Topic

6:45 That diagram is the clearest & easiest explanation of enigma I've ever seen.

That was so cool Mr. S. Travel isn't as easy or safe as it used to be. Thanks so much for the tour. I'm jealous. Of course The Turing Test is a fundamental idea behind AI

I can honestly say I am a wee bit green with envy, you have a piece of history I would love to put into my collection! I was back in the day unable to visit the Park, but have it on me bucket list, and when I do make that sojourn I will let you know as I would love to meet the master Logic Cheese Head! Peace

2:43 The simplest cipher is a Caesar cipher, where the letters are just shifted. For example, in a Caesar cipher with a right shift of 5, A becomes E, B becomes F, and so forth.

Captain Ridley’s Shooting Party were a great bunch

Tremendously interesting, only I was supposed to be working and ended up watching this instead. Still, thanks Mr S.

wonderful video, i wil admit, alot of that went very far over my head, however, i was riveted! thank you for giving me the link to this video! i subbed

When I heard her say a letter can not be encoded as itself, I thought "Well that might be useful to know" and it was. Good fun video mate. Now decode how a FE brain works....

There are electronic replicas of the Enigma machine available, simulating the mechanics in software. I'm seriously considering ordering a kit version...

30:52 "the indicator on these gold and black drums" Those are clearly white and blue.

Love it. It's a nice break from the flat earth fools.

Well done! You should do more videos like this. Funny, we were talking the movie "The Imitation Game" probably about the same time you were up loading this video.

I would LOVE to hear from ANYBODY else who, like me, has NEVER been inspired to go into STEM fields because of any science fiction or other form of entertainment, but I was inspired because of hard rigorous formal public school education, training, plus real history, real technology.

I still like the R4 comedy series set there "Hut 33".

I love the tech back in the day. Alen found that every day they started their transmissions with the same words. That's what enabled them to decipher the daily codes even faster.

How did the germans between themselves know, which setting to put the enigma machine on? If there was some kind of pre determined schedule, one would think that these could have been obtained during the war.

I keep wondering, cracking one crib/menu on the bombe reveals the message key for the encryption. But as every message had another message key, how did they get to the daily setting? It the message key the new crib to the daily key?

Haven't people got the decency to turn their phones OFF? Heared several in the background.....

watching the lady explain how to backwards the code is fascinating, you can imagine guys with toothbrush mustachios grinning from ear to ear cos their numbers were up in the billions not realising that all you had to do was slide a letter along one, a few times, and presto! jonny nazi: "it vill take the englisher pig dogs eternity to work zis out!!" plucky brits: "bung another rotor on the fire eh?"

BLETCHLEYPARKENIGMAANDTHEBOMBE simulator output...

Dit Dit dah dah dit Dit🤫 I think we used a five or six characters group code in the 80s in the USAF for some of encryption on Morse code and other open over the air comm. of course there were many other encryption devices, codes and equipment. Alan was truly a determined man along with his team. Very very sad what happened to him after the war! A hero for sure! Do you think that they knew he was gay before he was hired for the gig? Cryptologist never die! They just code away!

This was awesome, I will say however that there were a fair few things wrong in the presentation, Turning did not build or design the BOMBE, that was the British Tabulating Machine Company in Letchworth Hertfordshire, about 40 miles up the road from Bletchley, Harold Keen was the chief engineer at that company, he interpreted Turing's algorithms to create the BOMBE machines, for which they produced around 200, we don't have the exact number as it was a war time secret long after the disclosure of the Bombe, the presentation did not go into detail of how the machines actually worked, nor do they discuss the electromechanical algorithms of the rotors, brushes, shifters or how in turn the system allowed them to come up with "one" of the plug board settings, as the machines could only do so much, they don't discuss how the machine made automated deductions, how it's difference engine worked based upon pure logic, the looping system, the menu system found at the back of the machine, this is what allowed the machine to be set up to allow the Bombe to run a new decode directly after one had been completed, I imagine they did discuss this in the tour, at least a little but I feel as if they skipped the really interesting stuff to move the tour along, its a shame, also, the machine did not "search" for things as the lady in the presentation says, rather, it runs through logical contradictions based around logic loops, when it can't find any more after a set amount of loops or it finds a confirmation within the algorithm it stops, the electromechanical side of the machine is completely logic based, numbers are not required, its only the pre-setup and application that does that, that was done by MI5!

Very cool, however I can’t find answer for how did they knew at that time that enigma can’t produce the letter to itself 😅

Well done Mr Sensible. A really good video. It is probably worth mentioning that Turing chose chemical castration over imprisonment. Also that he was granted a royal pardon in 2013. If I have a criticism, it would be that the pictures you show when talking about Colossus are actually of "Heath Robinson" which could be considered its predecessor.

0:30 wait what? wermacht is army and Luftwaffe is air force.... it can't be both, right? I doubt the Germans used the same classification as the Americans, who didn't have a dedicated Air Force yet so they were folded into "The Army Air Corp." Surely the exact same thing wasn't the case in Germany as well.... am I wrong?

26 Factorial is 403.3 Trillion Trillion. Thanks Alexa

The 1940s Blockchain machine?

Sorry but I can't take this any longer. This nice lady is trying to explain the Enigma and Bombe machines against what sounds like five TV sets turned on, or a couple of films being shown, plus people coughing, talking and kids making noises. First up she's talking from behind a face mask and then behind a sheet of Perspex, apparently in another room with the Bombe. The nice lady has a good speaking voice and she's trying hard but there's just too much being lost. Put the volume up and the background noise is worse. You've got 11.4K subscribers, why didn't they just give you a private talk in silence before the guided tours started. Good thing I know quite a bit about these machines. I feel sorry for any 'listener' trying to learn about these fascinating machines for the first time. If you got yourself a really good microphone and a sound editing app for your computer you could improve the sound yourself. Please don't torture us for the sake of a video devoid of intelligible information. Cheers, BH

What his own government did to Turing is morally and criminally reprehensible. During this celebration of Pride Month, this video is another stirring reminder - not that we should need another reason - of why we need to ensure complete freedom for all LGBTQ+ persons