Caesar & Affine Ciphers: Letters as Numbers
This lesson is part of the course
In this lesson
You turn the word VAULTKEY into numbers, encrypt it with a Caesar shift and an affine key, and decrypt it again with the modular inverse.
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Lessons in this course
- MOD & Clock Arithmetic: Remainders That Wrap Around Locked
- Caesar & Affine Ciphers: Letters as Numbers Locked
- Frequency Analysis: Breaking a Caesar Cipher with COUNTIF Locked
- GCD & Euclid's Algorithm: A Step Table Locked
- Modular Inverse with the Extended Euclidean Algorithm Locked
- Fast Modular Exponentiation: Square-and-Multiply Locked
- Toy RSA: Keys, Encryption & Decryption Locked
- Check Digits & Hashing Ideas: ISBN-13 and Luhn Locked