Rotor Ciphers.

Slides:

Advertisements

Similar presentations

Ciphers and Permutations. Monoalphabetic Cipher is simply a permutation abcdefghijklmnopqrstuvwxyz SATBUCVDWEXFYGZRQPONMLKJIH Cycle Form (ASOZHDB) (CTNGVLF)

Advertisements

1 Codes, Ciphers, and Cryptography-Ch 3.2 Michael A. Karls Ball State University.

The History and Technology of the Enigma Cipher Machine The History and Technology of the Enigma Cipher Machine Ralph Simpson

Team Name: team13 Programmer: 陳則凱 b Tester: 劉典恆 b

A Presentation by: ~Ksenia Potapov ~Amariah Condon ~Janette Fong ~Janice Lau CRYPTOGRAPHY.

Security & Encryption Thomas Fenske & Joseph Minter.

Solving the Enigma How the Western Allies Cracked the German Secret Codes During WW II.

David Evans CS588: Security and Privacy University of Virginia Computer Science Lecture 4: Captain Ridley’s Shooting Party.

Enigma? Several Images from Wikipedia (an online encyclopedia)

Enigma Meghan Emilio Faculty Sponsor: Ralph Morelli (Computer Science)

Chris Christensen Department of Mathematics and Statistics Northern Kentucky University.

Enigma Machine - Design Presentation Group M1 Adithya Attawar Shilpi Chakrabarti Zavo Gabriel Michael Sokolsky Digital World War II Enigma Cipher Wed.

Inner Workings of the German Enigma. History of the Enigma The concept was invented by a German named Albert Scherbius in 1918 Scherbius tried to take.

1 Team M1 Enigma Machine 3rd May, 2006 Adithya Attawar (M11) Shilpi Chakrabarti (M12) Mike Sokolsky (M14) Design Manager: Prateek Goenka Adithya Attawar.

A Glimpse of the History of Cryptography

The Enigma Encryption System Andrew Regan CSC 290.

Purple 1 Purple Purple 2 Purple  Used by Japanese government o Diplomatic communications o Named for color of binder cryptanalysts used o Other Japanese.

Enigma Meghan Emilio Advisor: Professor Ralph Morelli April 2004.

Enigma 1 Enigma Enigma 2 Enigma  Developed and patented (in 1918) by Arthur Scherbius  Many variations on basic design  Eventually adopted by Germany.

Classical Encryption Techniques

Introduction to Information Security Chapter II : Classical Ciphers.

Famous Firsts in Computation MSE 2400 Evolution & Learning

Team Name: team13 Programmer: 陳則凱 b Tester: 劉典恆 b

ENCRYPTION Alex Piercey Erica Reid. What is Encryption?  Information secured to hide from the public  Used in many different ways but is mostly used.

Topic 21 Cryptography CS 555 Topic 2: Evolution of Classical Cryptography CS555.

Cryptography By, Anthony Lonigro & Valentine Mbah.

Keeping Secrets with Digital Technology Information Assurance Program Anderson School of Management.

Based on Applied Cryptography by Schneier Chapter 1: Foundations Dulal C. Kar.

Day 18. Concepts Plaintext: the original message Ciphertext: the transformed message Encryption: transformation of plaintext into ciphertext Decryption:

Introduction to Cryptography

National Institute of Science & Technology Cryptology and Its Applications Akshat Mathur [1] Cryptology and Its Applications Presented By AKSHAT MATHUR.

Terminology and classical Cryptology

CSCI 5857: Encoding and Encryption

Classic Cryptography History. Some Basic Terminology plaintext - original message ciphertext - coded message cipher - algorithm for transforming plaintext.

Conventional crypto - Noack Conventional crypto Diffusion and confusion How Mary Queen of Scots lost her head Various hand operable ciphers Various Enigmas.

Computer Security Cryptography. Cryptography Now and Before  In the past – mainly used for confidentiality  Today –Still used for confidentiality –Data.

David Evans CS551: Security and Privacy University of Virginia Computer Science Lecture 3: Striving for Confusion Structures.

Encryption of WWII Philip Gebhardt 10/24/2011. Interest.

CRYPTOLOGY IN WWII ByJOE&SEAN. SIGABA SIGABA was similar to the Enigma in basic theory A series of rotors enciphered every character of the plaintext.

The Storyboard stage. Mention what will be your animation medium: 2D or 3D Mention the software to be used for animation development: JAVA, Flash, Blender,

“IT IS A RIDDLE, WRAPPED IN A MYSTERY, INSIDE AN ENIGMA” * By: Michaela Wontroba Mr Kuniega; PD 5,6,7.

Turing’s Bombes. Solve Enigma using known plaintext Depending on German patterns, e.g. weather reports Sometimes setup by seeding/farming Depended on.

The cracking of Enigma in World War II John Bibb Harry Caplan Abhishek Chhikara Vladimir Grantcharov Aditi Kulkarni Nigel Lawrence Andrew Muldowney Hou.

The Enigma Machine Eric Roberts CS 106A February 3, 2016.

By, Amanda Rydzynski O’Brien Computer Skills

Chris Christensen Department of Mathematics and Statistics Northern Kentucky University.

The Mathematics Behind

Brief Incursion into Cryptography 1 20 th May 2008 Brief Incursion into Cryptography 20 th May 2008.

Secure communication Informatics for economists II Jan Přichystal

Traditional Symmetric-Key Ciphers

Communication Security

Cryptography CS Principles January 19, 2017.

History and Background Part 3: Polyalphabetic Ciphers

Matt Salamone and Pete McIlwee

In this lesson we will understand:

History of Cryptography

Enigma Machine.

Tea Boyarchuk History 12 December

National Cipher Challenge

The Race to Crack the Enigma Machine

An electro-mechanical rotor cipher machine created by the German engineer Arthur Scherbius.

M-94 Cylinder Cipher: A Story of Innovation, Intrigue and Deception

By Sean O’Mahoney from the Computing Society at Futures Friday

The History and Technology of the Enigma Cipher Machine

The German Enigma Machine The Secret Battlefield of WW2

WORLD OF WONDERS : THE ENIGMA MACHINE

Hill Cipher The Hill Cipher uses matrix multiplication to encrypt a message. First, you need to assign two numbers to each letter in the alphabet and also.

Modern Cryptography.

Symmetric Encryption or conventional / private-key / single-key

Presentation transcript:

Rotor Ciphers

History Invented in 1915 by Theo A. van Hengel and R. P. C. Spengler Edward Hugh Hebem developed a rotor machine in the United States in 1917. Arthur Sherbius designed the Engima machine. Marian Rejewski broke the Enigma machine in 1932.

Mechanization Rotors have 26 positions. Multiple rotors per machine User enters a character Electrical current goes through rotor Rotor rotates Next time same character is pressed, different cipher character is produced

Mechanization Key is pressed Current goes through rotor Cipher character lightbulb lights up Rotor rotates Reflector (only in Enigma) made decryption the same as encryption, but was flawed

Mechanization (Decryption) To decrypt, the user must know: Wheel order – The choice of rotors and their order Initial position of the rotors – Chosen by operator, changed for each message Ring settings – Position of the alphabet ring relative to the rotor wiring (shift cipher) Plug settings - Connections of plugs in plugboard (plugboard connects pairs of letters and switches them before and after main rotor)

Mechanization (Decryption) To decrypt, the rotors were taken out and turned around from the encryption position to reverse the circuitry. This was not necessary in the Enigma because of the reflector.

Cryptanalysis The unsteckered Enigma (without plugboard) was easily broken. The Polish discovered that they keyboard was arranged ABCDEF, as opposed to QWERTY. A French spy provided information to the Polish that allowed them to create a replica Enigma machine. The Polish broke the Enigma machine in 1932 through algebra.

Cryptanalysis The reflector was a flaw in Enigma machines. The Polish invented a device known as a cryptologic bomb, which was essentially six Enigma machines. The Germans constantly made more complex Enigma machines (such as the Kriegsmarine Enigma).

Bibliography http://www.burningwell.org/gallery2/d/2974-2/ttenigma4.jpg http://cleavebooks.co.uk/trol/trolc07.pdf http://en.wikipedia.org/wiki/Cryptanalysis_of_the_Enigma http://en.wikipedia.org/wiki/Rotor_machine http://en.wikipedia.org/wiki/Enigma_machine