ENCRYPTION


Part 1:
Simple Encryption & Secret Keys

Review / Caesar Cipher

(stop 2:09)

Random Substitution Cipher

Solvable using frequency analysis

3D data visualization sculpture by Mike Knuepfel

Height = frequency of letter use

Vigenere Cipher

???

Encryption with a "SECRET KEY"

 

 

Work with a partner:

  • Explore the Vigenère Cipher Widget to figure out how it works – the link is on our class website
     
  • Complete both sides of the activity guide (everyone should turn in their own)

keys are "computationally hard"

too many possibilities to compute in a reasonable amount of time

(stop 4:10)

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