Learn Cryptography
Hands-On
A tactile decoder ring paired with interactive lessons. From ancient Roman secrets to modern digital encryption.
What is a Caesar Cipher?
Julius Caesar protected military secrets by shifting each letter in his messages. Simple but clever - this ancient technique is the foundation of all modern encryption.
The CipherFidget decoder ring lets you experience this hands-on: rotate the ring, find your letter, and read the encoded result. It's the same principle computers use today, just with bigger numbers.
Interactive Lesson Plans
Free lessons covering everything from basic letter substitution to WWII codebreaking techniques and modern encryption concepts. Each includes interactive demos you can try right in your browser.
For EducatorsBETA
Bring cryptography into your classroom. Teachers can request an educator account to generate access codes, allowing students to explore all lessons without needing their own accounts. Join the beta program today to help shape the experience!
Get in touch to set up your course, discuss bulk CipherFidget orders, or learn more about the educator program.
Get Your CipherFidget
3D printed in North Charleston, SC. Snap-together construction, tactile notches for satisfying clicks, and endless learning possibilities.
Buy on EtsyMade by armpitMFG
Questions? armpitMFG@gmail.com