The Engima Cipher

The Engima Cipher Dr. Vicki Schell Pensacola Junior College [email_address] 9 September 2008

[object Object],[object Object]

ACTIVITY #1: How many possible keys are there when you swap each letter of the alphabet with another letter? 26*25*24*23*22*21*20*19*18*17*16*15*14*13812*11*10*9*8*7*6*5*4*3*2*1 =26! = 400 000 000 000 000 000 000 000 000

400 septillion keys 6.5 billion people in the world 31 million seconds in a year If everyone in the world checked one key per second, it would still take 2 billion years to check them all!

Code Breaking Tips ,[object Object],[object Object],[object Object],[object Object],[object Object]

The Enigma Machine ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The Plugboard ,[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],Simplified Plugboard

The Plugboard ,[object Object],[object Object],[object Object]

Rotor Cipher Machines ,[object Object],[object Object],[object Object]

The Rotors ,[object Object],[object Object],[object Object]

The Rotors ,[object Object],[object Object]

The Rotors: Operations ,[object Object],[object Object]

The Rotors: Operations ,[object Object],[object Object],[object Object]

The Rotors: Example ,[object Object],[object Object],[object Object],[object Object],[object Object]

Settings of the Daily Keys ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Bletchley House During World War II, codebreakers at Bletchley Park solved messages from a large number of Axis code and cipher systems, including the German Enigma machine. For this purpose, the Bletchley Park mansion was soon joined by a host of other buildings. The mansion's facade is an idiosyncratic mix of architectural styles.

Bletchley House ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The Weaknesses of the German Enigma ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The Decryption Process at Bletchley Park ,[object Object],[object Object],[object Object]

Rodding & Cribs ,[object Object],[object Object],[object Object],[object Object]

Rodding & Cribs ,[object Object],[object Object],[object Object]

Rodding & Cribs ,[object Object],[object Object],[object Object],[object Object],[object Object]

Rodding & Cribs ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The Bombe ,[object Object],[object Object],[object Object],[object Object],[object Object]

The Bombe ,[object Object],[object Object],[object Object],[object Object]

How to Speak Crypto ,[object Object],[object Object],[object Object],[object Object]

How to Speak Crypto Code : whole words or phrases replaced by a letter or number Cipher : Individual letters are replaced with other letters or symbols Plaintext : normal English Ciphertext : coded English Cryptology : the art and science of making and breaking “secret codes” Crytography : making “secret codes” Cryptanalysis : breaking ‘secret codes”

http://www.bletchleypark.org/ Thanks to Mike Koss for permission to use his paper Engima machine Simon Singh. The Code Book - The Science of Secrecy from Ancient Egypt to Quantum Cryptography . ENGIMA Director: Michael Apted. Actors: Dougray Scott, Kate Winslet, Saffron Borrows, Jeremy Northam, Nikolaj Coster-Waldau.

The Engima Cipher

Empfohlen

Empfohlen

Weitere ähnliche Inhalte

Was ist angesagt?

Was ist angesagt? (6)

Andere mochten auch

Andere mochten auch (6)

Ähnlich wie The Engima Cipher

Ähnlich wie The Engima Cipher (20)

Kürzlich hochgeladen

Kürzlich hochgeladen (20)

The Engima Cipher