Caesar Cipher Decoder Extension

Installation Guide

Step 1: Download and Extract

Download the extension .zip file and extract it to a folder on your computer.

Step 2: Enable Developer Mode

1. Open Chrome and go to chrome://extensions/
2. Toggle on "Developer mode" in the top right corner

Step 3: Load the Extension

1. Click "Load unpacked"
2. Select the folder named "ceaser" containing the extracted extension files
3. The extension icon should appear in your Chrome toolbar

Step 4: Using the Extension

1. Click the extension icon in your toolbar
2. Enter or paste the encrypted text
3. Click "Decrypt" to see all possible solutions

About Caesar Cipher

The Caesar Cipher is one of the simplest and most widely known encryption techniques. It works by shifting each letter in the plaintext by a fixed number of positions in the alphabet.

Caesar Cipher Decryption

Our extension uses a brute force approach to try all possible shift values (0-25) to decrypt the message. Each letter in the encrypted text is shifted back by a certain number of positions to reveal potential plaintext messages.

Frequency Analysis

To improve accuracy, we implement frequency analysis that compares letter frequencies in the decrypted text with standard English letter frequencies. This helps identify the most likely correct decryption.

How It Works

The extension combines both decryption techniques:

Generates all possible 26 shifts of the ciphertext
Analyzes letter frequencies in each decryption
Scores each possible solution based on how closely it matches expected English letter frequencies
Presents results sorted by likelihood of being correct

Download the Extension