Join the Cryptokids as they apply basic mathematics to make and break secret codes. This book has many hands-on activities that have been tested in both classrooms and informal settings. Classic coding methods are discussed, such as Caesar, substitution, Vigenère, and multiplicative ciphers as well as the modern RSA. Math topics covered include: - Addition and Subtraction with, negative numbers, decimals, and percentages - Factorization - Modular Arithmetic - Exponentiation - Prime Numbers - Frequency Analysis.

The accompanying workbook, The Cryptoclub Workbook: Using Mathematics to Make and Break Secret Codes provides students with problems related to each section to help them master the concepts introduced throughout the book. A PDF version of the workbook is available at no charge on the download tab, a printed workbook is available for $19.95 (K00701).  The teacher manual can be requested from the publisher by contacting the Academic Sales Manager, Susie Carlisle

part |1 pages

Unit 1 Introduction to Cryptography

chapter 1|6 pages

Caesar Ciphers

chapter 2|12 pages

Sending Messages with Numbers

chapter 3|7 pages

Breaking Caesar Ciphers

part |1 pages

Unit 2 Substitution Ciphers

chapter 4|6 pages

Keyword Ciphers

chapter 5|6 pages

Letter Frequencies

chapter 6|11 pages

Breaking Substitution Ciphers

part |1 pages

Unit 3 Vigenère Ciphers

chapter 7|10 pages

Combining Caesar Ciphers

chapter 9|10 pages


part |1 pages

Unit 4 Modular (Clock) Arithmetic

chapter 11|12 pages

Introduction to Modular Arithmetic

chapter 12|9 pages

Applications of Modular Arithmetic

part |1 pages

Unit 5 Multiplicative and Affine Ciphers

chapter 13|8 pages

Multiplicative Ciphers

chapter 14|12 pages

Using Inverses to Decrypt

chapter 15|9 pages

Affi ne Ciphers

part |1 pages

Unit 6 Math for Modern Cryptography

chapter 16|12 pages

Finding Prime Numbers

chapter 17|7 pages

Raising to Powers

part |1 pages

Unit 7 Public Key Cryptography

chapter 18|8 pages

The RSA Cryptosystem

chapter 19|6 pages

Revisiting Inverses in Modular Arithmetic

chapter 20|7 pages

Sending RSA Messages