Your browser doesn't support the features required by impress.js, so you are presented with a simplified version of this presentation.
For the best experience please use the latest Chrome, Safari or Firefox browser.
CIS 115
Cryptography
Cryptography
Message to the Class
TSTEPHAAXLISLAESCEMQIYQ
Scytale
Image Source: Wikipedia
Message to the Class
TSTEPHAAXLISLAESCEMQIYQ
T H I S I
S A S C Y
T A L E Q
E X A M
P L E Q
Early Ciphers
Tabula Recta
Image Source: Wikipedia
Image Source: Wikipedia
Enigma Machine
Image Source: Wikipedia
Enigma Machine Rotors
Image Source: Wikipedia
Enigma Machine Rotors
Image Source: Wikipedia
Enigma Machine Ratchet
Image Source: Wikipedia
Image Source: Wikipedia
Enigma Machine Plugboard
Image Source: Wikipedia
Enigma Key
Enigma Operation
Enigma Stengths
Enigma Weaknesses
Marian Rejewski
Image Source: Wikipedia
Cracking Enigma
Bombe
Image Source: Wikipedia
Impact
“My own conclusion is that it shortened the war by not less than two years and probably by four years … we wouldn't in fact have been able to do the Normandy Landings, even if we had left the Mediterranean aside, until at the earliest 1946, probably a bit later.”
-Sir Harry Hinsley
British Intelligence Historian
Claude Shannon
Image Source: Wikipedia
Symmetric Key Encryption
Image Source: Wikipedia
Public Key Encryption
Image Source: Askamathematician.com
RSA Encryption
RSA Example
RSA Example
RSA Keys
Assignments
Blog 9: Privacy in an Open Digital World
Privacy has become a major topic of conversation in technology over the past decade. Between the push for ever-tighter security after the attacks on September 11th, 2001, and the revelations from Edward Snowden (and others) that massive amounts of data about ordinary people is being collected and analyzed each day, it is a topic that affects each and every one of us.
Many news outlets use the term "pendulum" when talking about the balance between security and privacy, since public opinion seems to swing back and forth between the two depending on recent events and personal beliefs. (Just search for "privacy pendulum" online to see what I mean.)
For this blog article, right about your personal viewpoint regarding security vs. privacy on the internet. For example:
RSA Activity