• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Why was Bletchley Park able to break the German Enigma codes?

Extracts from this document...


A.D. Kieran Williams August 2003 Why was Bletchley Park able to break the German Enigma codes? Bletchley Park was able to break the German Enigma codes for a number of important reasons. Firstly, the British were ably assisted by the Poles during the 1930s. The Polish Intelligence recruited a spy in the German Army, who supplied them with secret documents describing the Enigma machine. The Poles constructed two replica machines using this information, and in August 1939, they handed these to the British and French. This enabled Station X to understand how it worked. The machine contained three wheels with letters of the alphabet in order printed on them. ...read more.


The rotors never stayed in the same position for more than 2 days, which aided the decoding. The 'Double Indicator', a codebook issued to operators, which specified the day's settings for the machine, was not always adhered to. Some operators chose their own setting, and sent the three letters twice. This repetition gave the code breakers another way of cracking the code. The operators often used familiar letters such as HIT - for Hitler. Alan Turing and John Herivel played crucial parts in breaking the Enigma code. Turing's idea was that a machine could carry out calculations if fed information on a strip of paper. ...read more.


HIT for Hitler). 'Crib' was a correctly deciphered part of a message, which gave them clues, such as the 6am weather broadcast. In 1941, 2 U-boats were captured, and parts of the 'Dolphin' Enigma machine, the Navy's version, were found. This allowed the Dolphin code to be cracked. In 1941, aboard the U-570, the 'Shark', a 4-wheeled Enigma machine was captured, enabling Bletchley Park to crack the code that was to be used on all U boats. 'Fish', the machine that Hitler used, was coded differently to the others, and did not use Morse code. This was a problem, as no one knew what it looked like. After 2 months, Bletchley Park managed to construct their own 'Fish' and were able to decipher very important messages. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Computer Science section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Computer Science essays

  1. CP3 - Proposed Solution to a Realistic Problem - Apartment Administration software

    OR (newrec) Then inc(noofrec); end; newrec:=false; end; Procedure ClearArray; var count:integer; Begin For count:=1 to size do // Repeat for every record in the array BEGIN WITH FormBooking do WITH bookinglist[count] do // With all counted records BEGIN weekbegin:=''; lastname:=''; occupants:=0; deposit:=false; paid:=false; erased:=false; // Clear all the fields and

  2. Computer Aided Design Package

    computers will have internet access and a firewall will help stop any unauthorized people gaining access to the computer system. If some one did gain access to the system the damage they do could be a lot, for example if they deleted all files on the computer before a backup

  1. Bar codes

    (a). Advantages to the customer of using the computers in the supermarket is that there will be less chance of any errors, and also there will be more information about the item and a faster service. (b). Disadvantages to the customer of using computers is that the computer may

  2. The Enigma machine.

    The help from the Poles was extremely important, they provided Britain and France the jump start they needed and gave them a chance in the battle against Enigma.

  1. Why was BletchleyPark able to break the Enigma codes?

    the end of June enabling the British to work out how the enigma machines work. In March 1943 the code breakers at Bletchley Park were able to break in to shark again thanks to the capture of the short signal codebook captured from U-559 on October 30 1942.

  2. Bletchley Park

    The Germans were so confident that the Enigma was unbreakable they carelessly provided clues for the code breakers. The people at Bletchley Park knew that a letter never represents it self. This became important when pieces of information were put together.

  1. The Von Neumann Machine

    a memory write operation � Reset clears all internal registers and starts executing instructions from a pre-defines address (similar to switching off and on again) The purpose of the control bus is to transmit command, timing and specific status information between system components.

  2. Describe the organization and work of the people at Bletchley Park.

    This of course accelerated to process in which the enigma was eventually broken. Originally, those working at Bletchley Park were not respected or given the appropriate amount of attention by the SIS. (The secret intelligence service) However, this changed after Bletchley accurately predicted the location of a German warship that was just about the attack the British.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work