## S. Jane C. Beattie

### USC Aiken

### Department of Mathematical Sciences

## HOW TO BREAK SUBSTITUTION
CIPHERS LESSON

Welcome to the Code Lesson on HOW TO break substituion ciphers.
The simplicity of this code is not to say that it has no application.
We will use alphabet ciphers to represent our message and examine
ways to break these codes. Then we will discuss how to break a
ciphered sample.

First, here is a word about the class and the instructor.

The name of the class at USCA is Discrete Mathematics. You will
wonder when you see no numbers how this
can be a mathematics class. Much of mathematics
is without numbers! In this particular case, frequency of use
of particular letters and patterns of letters in the English language
are very well suited to the study of mathematics because
mathematicians study patterns of numbers and derive ways to predict
data. We think of making order from chaos, and it is like a puzzle to
those of us who love it! The class of students find the study of
discrete mathematics refreshing and appreciate having mathematics
without algebra or calculus even though they are using some of the
exact same techniques to problem solve!

To begin the lesson click on CODE
WORDS.

To return to RPSEC Home page,
click here.

To return to USCA Home page,
click here.

To go to related Code
sites, click here.

#####

http://rpsec.usca.sc.edu/Classwork/731sp2000/Lesson/Beattiel/(March,
2000)

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