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Cracking the Code -- The Mathematics of Cryptanalysis

Lesson 1 -- Introduction

Lesson 2 -- Modular Arithmetic

Lesson 3 -- Increasing Our Code-Breaking Skills

Lesson 4 -- Practicing Frequency Analysis

Lesson 5 -- More Modular Arithmetic

Lesson 6 -- Affine Cyphers

Lesson 7 -- Review

Lesson 8 -- The Vigenere Cypher, One-Time Pads, and Enigma

Lesson 9 -- The Current State of Affairs and Some Number Theory

Lesson 10 -- Public Key Cryptography

Can You Hear Me Now? -- The Mathematics of Sound and Music

Lesson 1 -- Cartesian Coordinate Graphs

Lesson 2 -- Using Periodic Graphs to Model Sound

Lesson 3 -- Using the Sine Function to Model Periodic Graphs

Lesson 4 -- Natural Harmonics

Lesson 5 -- Musical Intervals and Logarithms

Lesson 6 -- Pythagorean Tuning

Lesson 7 -- Equal Temperament and Other Tuning Systems

Lesson 8 -- Review