• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month
Page
1. 1
1
2. 2
2
3. 3
3

# 'Why was Bletchley Park able to break the German Enigma Codes?' The Enigma machine was a complicated machine that looked like typewriter, inside a wooden box. It had

Extracts from this document...

Introduction

History Coursework Year 10 'Why was Bletchley Park able to break the German Enigma Codes?' The Enigma machine was a complicated machine that looked like typewriter, inside a wooden box. It had two keyboards, one to type in the message, and one to display the decoded message. It also consisted of 5 rotors (later increased to make it more secure), and 10 plugs to set up the machine. The rotors each contained 26 letters (the alphabet). To use the machine, both the sender and the recipient had to set their machines the exact same way, using the plugs and rotors. Using the codebook, 3 of the 5 rotors were set, for example "N.J.A". And the ten different plugs were placed into the sockets, for example Plug 3 was put in sockets B and C. These settings were changed at least once a day once the war had begun. After the machine was set, the sender could then type in his message, and receive it on the higher keyboard as a cipher. This cipher was then sent to the recipient by morse code. The recipient then typed the cipher into his machine (set exactly the same way), and received the decoded message on the higher keyboard. ...read more.

Middle

This also could also be used to work out the settings. John Herivel, a 21-year-old mathematician, used these mistakes made by the Germans as a base for his ingenious idea. He attempted to exploit these mistakes by trying to imagine a German enigma operator's daily routine. He assumed that the operators would not be too careful when sending messages, as they believed that the machine was unbreakable. Herivel thought that the German operators might send the three letters that they could see when the lid of the Enigma machine was closed, instead of a random message. If this were true, the settings for the day would be given away. Herivel's idea was ingenious and was greeted by great enthusiasm. However, it did not work at first, as there were too few messages sent in February and March 1940. Although after the invasion of Denmark and Norway, the method became more successful as there was a great increase in the number of messages sent each day. This made it easier, as there was a greater chance of finding similar messages. Alan Turing was another man who is known for his great individual effort to breaking the Enigma codes. He was the creator of the 'bombes'. ...read more.

Conclusion

However, the main breakthrough in cracking the 'Dolphin' came when Harry Hinsley, an intelligence officer, discovered that German weather ships also carried codebooks. When two were captured, they provided codebooks for June and July. Using all theses clues as well as other methods, Bletchley Park was able to crack the 'Dolphin' in July 1941 and continued to break its codes until the end of the war. There were many reasons why Bletchley Park was able to break the Enigma Codes. The most important reason however, was the Poles assistance. Without the Poles help, Bletchley Park would never of had anything to work from, and would never have been able to break any Enigma codes. It was impossible without a replica, which was just what Poland provided. Other less important reasons why Bletchley Park was able to break the Enigma were the mistakes made by the Germans, and the production of new technology. If the Germans were careful, and did not make any sort of mistakes, the ideas of Turing and Herivel would not have had any success at all. The technology was vital in Bletchley Park as it greatly reduced the time taken to break a message, as it no longer had to be done manually. Without the Poles help, German mistakes and the new technology, the allies would never of had a chance of breaking the Enigma. ?? ?? ?? ?? ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Accounting & Finance 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

# Related GCSE Accounting & Finance essays

1. ## Hampton Machine Tools Company Case

1673 779 1604 Cash disbursements Interest on 1M loan 15 15 15 15 Interest on 350K loan 5.25 5.25 5.25 Tax paymnets 181 181 Expenses 400 400 400 400 Purchases 948 600 600 600 Fixed asset outlay 350 First Loan 0 0 0 1000 Second loan 350 Dividends 0 Total

2. ## Management Accounting Report.

Staff might sign in on behalf of each other etc. Activity C On the activity C, I am going to show the job-costing sheet. Direct cost Quotation Labour: Assembly �2500 Painting �2200 Packing �4800 Total �9500 Materials: Assembly �100 Painting �400 Packing �500 Total �1000 Absorption: Assembly 1000 x 3.26

1. ## Unit 5 Introduction to Accounting

The most common are shown below: * Salaries - paid to sales staff * Carriage - the cost of delivering the product * Marketing - such as advertising and promotion costs Finance costs Just a few businesses can operate without a bank account, but there are further expenses associated with this.

2. ## This report has been produced as evidence for Unit 9 - 'Financial Services' - ...

The rest of the expenses I researched and found out the likely expenses a person. The insurance with Tesco that is �9.20 a month. Recommendation I would advise Jamie McPherson, to invest some of his �22,741 in shares because he can earn much higher but has higher risk, to reduce

1. ## What does Finance involve.

Also it could mean that I need more place to keep my stock in. So as I have looked at how much money I will be making by sell or ranting my flat I still don't think that this would be a good option as the flat will not be

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

ULTRA was added to all messages leaving BP this made it impossible for German agents to discover BP's purpose. ULTRA meant no decrypts could be used to take Military action unless they could have come from another source. Alan Turing was responsible for the first breakthrough while consulting the Poles.

1. ## Why was Bletchley Park able to break the German Enigma codes

It is likely that if the Germans had used the Enigma exactly as directed, it would have been a lot harder to crack. Common mistakes were made, such as not replacing or changing the order in which the cog wheels were arranged, not arranging the two plugs in the correct formation.

2. ## Identifying and describing the main financial service needs for a student starting at university

Net rate p.a.% Advantage Gold 0.25 0.25 0.20 Current Plus 0.10 0.10 0.08 Card Plus 3.60 3.66 2.88 Students/Graduates 0.10 0.10 0.8 Step Account 0.10 0.10 0.08 Interest you pay if you are overdrawn Advantage Premier If you use your agreed overdraft by up to �250 you will not be charged any interest.

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