Caesars Cipher
Last updated September 2023
freeCodeCamp Certification Project
Developer Credits
- Developed by Daniel Fletcher
Project Link
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Skills & Technologies
- JavaScript
Project Details
JavaScript implementation of the Caesar cipher substitution algorithm. Uses the common ROT13 variant.
It's time to get cryptographical!
In this project, I implemented a variant of the Caesar cipher algorithm known as ROT13. This essentially means that each letter in a given plaintext is swapped out for the exact letter 13 later in the alphabet, where 'Z' wraps back around to 'A' in terms of the calculation. Part of why this variant is common in learning environments (but absolutely atrocious in practice) is that any given ciphertext encoded using this method can be decrypted using the exact same method.
The CodePen link above will open an in-browser code editor and console. Tinkering at the console will enable you to interface with the rot13 function I implemented.
If you'd like to hear one of my personal TV show hot takes, try calling rot13 at the console to decrypt the following ciphertext:
"CNEXF NAQ ERP VF ORGGRE GUNA GUR BSSVPR"
Relevant links:
Related Projects
This is certification project 3 of 5 in the JavaScript Algorithms and Data Structures track at freeCodeCamp. Each of my project submissions in this track is linked below.
Roman Numeral Converter
Sep 2023
JavaScript implementation of a function that converts a base-10 integer to its Roman numeral counterpart.
Caesars Cipher
Sep 2023
JavaScript implementation of the Caesar cipher substitution algorithm. Uses the common ROT13 variant.