# HAWTHORNE HIGH SCHOOL

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# CRYPTOLOGY

Information is power.

Even before the first written word, the need to safeguard information created an ongoing evolutionary battle between codemakers and codebreakers .

Cryptology is the study of secret writing such as codes and ciphers. Beginning with early techniques for creating secret writing, such as the Caesar shift, monoalphabetic substitution, and the Vigenère cipher, students then move on to learn about modern techniques including digital encryption and RSA public key cryptography. Discussions about the vulnerabilities of each encryption system enable students to attack and decrypt messages using techniques such as frequency analysis and cribbing. Students apply what they learn to encrypt and decrypt their own secret writing.

Class

Materials

Distribution

Attendance and

Assignments

Required Materials:

 Binder for handouts

The Code Book – Simon

Singh lined paper

 Assessments

(quizzes, tests, final exam)

Recommended Materials:

 Scientific or graphing calculator

Student grades are based on the total number of points earned using the following scale:

A = 90-100%

B = 80-89%

 Assignments

 Projects

 Group Challenges and

Scavenger Hunt

C = 70-79%

D = 60-69%

F = below 60%

Attendance is necessary to learn the material in this class. You are responsible for all notes and assignments you miss due to an absence, excused or unexcused. Most assignments will be completed during class time, however some will be assigned as homework.

Many assignments will require partner or group work.

Course

Pacing

Guide

Mathematical topics Codes and Historical Topics

Combinatorics and Permutations

Probability

Modular Arithmetic

Prime Numbers

Matrices

Solving Equations

Euclidean Algorithm

Transposition Ciphers

Caesar Shift

Monoalphabetic Substitution

 Vigenère cipher

Playfair cipher

Hill cipher

Engima Machine

RSA encryption

Public Key Cryptography