Skip to content # Codes, Ciphers, and Secrets

## Activity Guide

# This guide looks at cryptography examples and goes into the underlying math of the activity.

Ho, Anne. (2008). Codes, Ciphers, and Secrets. In S. Kohli (Ed.), Math Circle Activity Database. American Institute of Mathematics. https://mathcircles.org/activity/codes-ciphers-and-secrets

Contributor(s): Anne Ho

Math Circles: MTC Network

- Activity Description
- Topics Covered
- Session Styles
- Mathematical Practices

Cryptography is the study and practice of secure communication, making it an interesting and relevant application. In addition to number theory concepts like modular arithmetic, this session uses locks, codes, and ciphers to explore functions (definition, inverse functions, linear functions).