crluo / decoder-ring-project

decoder-ring-project

capstone project that algorithmically mimics well known historic ciphers

technologies: JavaScript, Node.js

Caesar Shift

encodes/decodes a string via taking the alphabet and "shifting" letters to the right or left, based on the typical alphabetic order

ex. caesar("message", 8) outputs "umaaiom"

Polybius Square

encodes/decodes a string by arranging a typical alphabet into a grid and each letter is represented through a coordinate

ex. polybius("message") outputs "23513434112251"

Substitution Cipher

encodes/decodes a string using a standard alphabet and a substitution alphabet, letters from the standard alphabet will be transposed to the standard alphabet

ex. substitution("message", "$wae&zrdxtfcygvuhbijnokmpl") outputs "y&ii$r&"