0
The Enigma Machine Overlake School January 16, 2002 Mike Koss
Battle of the Atlantic - World War II <ul><li>The Germans used submarines to try to stop the Americans from sending war su...
Submarine Tracking <ul><li>The British tried to keep careful track of submarine locations to keep shipping convoys out of ...
Communication Secrecy <ul><li>The Germans needed a way to secretly communicate with their submarines. </li></ul>
The Enigma Machine <ul><li>The Germans adapted a machine for encoding all military communications which they believed to b...
Code Breakers of Bletchley Park <ul><li>The British assembled a team of mathematicians, crossword puzzle geniuses, and cle...
First Computers Invented <ul><li>Along the way, they invented the world’s first digital stored program computer to help th...
Demo: Sending an Enigma Message <ul><li>Set up today’s rotor settings from the published (secret) code book. </li></ul><ul...
Demo: Receiving an Enigma Message <ul><li>Set up today’s rotor settings from the published (secret) code book. </li></ul><...
How Enigma Works <ul><li>Enigma uses a system of 3 or 4 “rotors” that electrically connect a keyboard to a “lamp-board”. <...
Scrambling Letters <ul><li>Each letter on the keyboard is connected to a lamp letter that depends on the wiring and positi...
Other Machines <ul><li>M-94: United States – Thomas Jefferson patented, used in civil war through WW II. </li></ul><ul><li...
Upcoming SlideShare
Loading in...5
×

Enigma History

81,002

Published on

History of the Enigma machine and its importance in World War II.

Published in: Technology
1 Comment
0 Likes
Statistics
Notes
  • I wonder how much this movie made, its such a great film, I could see it over and over again, Watch the full movie at movies-play dot com
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
  • Be the first to like this

No Downloads
Views
Total Views
81,002
On Slideshare
0
From Embeds
0
Number of Embeds
12
Actions
Shares
0
Downloads
161
Comments
1
Likes
0
Embeds 0
No embeds

No notes for slide

Transcript of "Enigma History"

  1. 1. The Enigma Machine Overlake School January 16, 2002 Mike Koss
  2. 2. Battle of the Atlantic - World War II <ul><li>The Germans used submarines to try to stop the Americans from sending war supplies to the British. </li></ul>
  3. 3. Submarine Tracking <ul><li>The British tried to keep careful track of submarine locations to keep shipping convoys out of harms way. </li></ul>
  4. 4. Communication Secrecy <ul><li>The Germans needed a way to secretly communicate with their submarines. </li></ul>
  5. 5. The Enigma Machine <ul><li>The Germans adapted a machine for encoding all military communications which they believed to be unbreakable…but… </li></ul>
  6. 6. Code Breakers of Bletchley Park <ul><li>The British assembled a team of mathematicians, crossword puzzle geniuses, and clerks to break the German codes. </li></ul>
  7. 7. First Computers Invented <ul><li>Along the way, they invented the world’s first digital stored program computer to help them crack the hardest German codes. </li></ul>Colossus
  8. 8. Demo: Sending an Enigma Message <ul><li>Set up today’s rotor settings from the published (secret) code book. </li></ul><ul><li>Chose a three-letter message key. </li></ul><ul><li>Encode the message key (twice: e.g., XYZ-XYZ). </li></ul><ul><li>Set rotors to message key setting. </li></ul><ul><li>Encode the message. </li></ul>
  9. 9. Demo: Receiving an Enigma Message <ul><li>Set up today’s rotor settings from the published (secret) code book. </li></ul><ul><li>Decode the first 6 letters of the message to get the message key. </li></ul><ul><li>Set the rotors to the message key setting. </li></ul><ul><li>Decode the contents of the message. </li></ul>
  10. 10. How Enigma Works <ul><li>Enigma uses a system of 3 or 4 “rotors” that electrically connect a keyboard to a “lamp-board”. </li></ul>
  11. 11. Scrambling Letters <ul><li>Each letter on the keyboard is connected to a lamp letter that depends on the wiring and position of the rotors in the machine. </li></ul>
  12. 12. Other Machines <ul><li>M-94: United States – Thomas Jefferson patented, used in civil war through WW II. </li></ul><ul><li>M-209: United States – used by WW II paratroopers. </li></ul><ul><li>NEMA: Swiss “New Machine” – a better Enigma. </li></ul>
  1. A particular slide catching your eye?

    Clipping is a handy way to collect important slides you want to go back to later.

×