micah-patrick / decoder-ring

Thinkful student project. Users can encode and decode messages using three different ciphers: Caesar Shift, Polybius Square, and Substitution Cipher

Decoder Ring

Thinkful student project. Users can encode and decode messages using three different ciphers: Caesar Shift, Polybius Square, and Substitution Cipher

LINKS

App

SKILLS USED

• Javascript
• Chai
• Mocha

SCREENSHOTS

Caesar Shift:

The Caesar Shift is a type of substitution cipher originally used by Julius Caesar to protect messages of military significance. It relies on taking the alphabet and "shifting" letters to the right or left, based on the typical alphabetic order.

Polybius Square:

The Polybius Square is a cipher that is achieved by arranging a typical alphabet into a grid. Each letter is represented through a coordinate. For example, in the above table, the letter "B" would be represented by the numerical pair "21".

Substitution Cipher:

The Substitution Cipher requires a standard alphabet and a substitution alphabet. Letters from the standard alphabet will be transposed to the standard alphabet. This cipher requires that the recipient have the substitution alphabet, otherwise it will be difficult for them to decode the message.