fifa stands for 211.
fifa stands for 211.
what does fifa stand for?
211
Na
Na
intercepted morse coded messages had been enciphered by the germans’ enigma, an electro-mechanical rotor cipher machine that implemented a polyalphabetic cipher. the main model in use in 1940 had three rotors that set an electrical pathway from the keyboard to the lampboard. pressing a key caused one lamp to light and the right-most rotor to advance by one letter position. this changed the electrical pathway so that pressing the same key again caused a different letter to light up. at one of the 26 positions, a notch on the right-most rotor engaged with the middle rotor so that the two rotors advanced together, and similarly the middle rotor would engage with the left-most rotor, giving a very long period before the sequence repeated (26 × 26 × 26 = 17,576). the ring on the rotor that contained the notch and so caused the next rotor to advance, could be set to any one of the 26 positions. the three rotors were selected from a set of five, giving 60 different ways of mounting rotors in the machine. however, because the germans laid down the rule that no rotor should be in the same position on successive days, if the previous days's rotors and their positions were known, this number was reduced to 32.
john herivel