Five digits. And then they would add-- to encipher that code group, they would add five digits to that code group to encipher each digit, right? To change each digit using something called non-carrying addition.
We are intercepting all of those messages. super-enciphered system. So they're doing the brain work in order to subtract out the encipherment, reversing the false math--
Some of the boats are thousands of-- you know, 100,000 miles away from his command. And so all of these enciphered and encoded communication systems are traveling through the airwaves. Radio waves. They are being encoded and enciphered , sent generally using Morse code, and that is what we have to learn how to snatch out of the airwaves
room old habits die hard this is the process of encipherment on the T there's your cleer um first there was a set of K
And that probably makes him an ideal candidate to be hired to join the code breaking team of Bletchley Park, because as you all know, the key problem in 1939 was that the Germans were using the Enigma machine to encipher their communications, and with the vast number of permutations as the way the machine can be set up there is a serious challenge.
It's changed again and then gets changed three more times. So this was quite an effective way to encipher messages. The other thing was that it made it very easy.
with a G, it would come out enciphered as an A. And the reason for that is this allows you to encipher and decipher with the same code settings.
And so that's just an example of one system that's being used during the war. And just to give you a sense of how many enciphered and encoded systems are now racing through the airwaves, if you think of how many communications you send through the air every day-- emails, tweets, Instagrams, Facebook updates, everything that you send all day long.
We are intercepting all of those messages. Just today as we hope that our financial transactions are enciphered after we make them and encrypted, which is our modern word for encipherment,
We are intercepting all of those messages. And so this group was assigned to the codes enciphered to the private sector to make sure nobody was doing business with Hitler or doing business
three lines five lines of transmission the letter B had one positive two negatives and two positives the process of encipherment if that was the clear text and that was the cipher you would add that to that and you would get
Might stand for, let's say, destroyer. Five digits. And then they would add-- to encipher that code group, they would add five digits to that code group to encipher each digit, right?
with a G, it would come out enciphered as an A. But I think the Germans felt that this was important to be able to encipher and decipher without having to change keys or change settings.
And so all of these enciphered and encoded communication systems are traveling through the airwaves. Radio waves. They are being encoded and enciphered , sent generally using Morse code, and that is what we have to learn how to snatch out of the airwaves and decipher in order that there not be another Pearl Harbor attack as we are sending our young men into harm's way.
We are intercepting all of those messages. system. And they were working the codes enciphered to the private sector.
This is Colossus. This is the machine that was used at Bletchley Park to break a different kind of German code, the teleprinter code, which was enciphered on a machine called the Lorenz SZ42, and the Colossus, again, was another step forward on the road towards modern computing technology because this is an electronic machine, unlike the bombe, which is electromechanical.
And so it works much like the plug board, but with all the letters plugged. So if for instance you come in as an A and it was enciphered to a G, if you came in to this reflector with a G, it would come out enciphered as an A.
So if for instance you come in as an A and it was enciphered to a G, if you came in to this reflector with a G, it would come out enciphered as an A. And the reason for that is this allows you to encipher and decipher with the same code settings.
with a G, it would come out enciphered as an A. I mentioned that it allows for ease of use by deciphering and enciphering with the same key.
We are intercepting all of those messages. So again, that's the quality of the intelligence that was being produced by these code encipher systems.
All of the German military services, particularly the U Boats, we are concerned about. Admiral Donitz is communicating with every U Boat, using enciphered communications that have been scrambled by the Enigma machine that is in every U Boat. And so that's just an example of one system that's being used during the war.
with a G, it would come out enciphered as an A. Also, this became a very big home in the design of the Enigma, because what it meant was no letter could encipher to itself.
The Battle of Midway and our breaking of the Japanese naval fleet code was number two. But number three, which you don't hear as much about, was our breaking of the super-enciphered system being used by the Japanese Army to communicate with its supply ships. So the Japanese Army spread out on these islands around the Pacific.