Project Krypton TechHack

It's a software implementation of 'Confederate Army Cipher Disk' programmed using 'C'. To know more about this cipher disk visit: https://www.youtube.com/watch?v=y94Mfvr2pKI

The inner ring of this disk implementation has alphabets in reverse order as in: https://www.britannica.com/topic/cipher-disk

To compile and execute it online, visit: http://www.tutorialspoint.com/compile_c_online.php

Goal

The goal of this project is to develop a simple encryption and decryption program using a custom substitution cipher. The program will take a 3-letter code and a message as input and output the encoded or decoded message.

Deliverables

1. A C program that:
   • Prompts the user to enter a 3-letter code in uppercase.
   • Generates a substitution cipher based on the code.
   • Prompts the user to enter a message to encode or decode.
   • Outputs the encoded or decoded message.
2. Documentation explaining the code and the process.

Process

1. Input Handling:

   • Prompt the user to enter a 3-letter code in uppercase.
   • Calculate the starting index based on the first letter of the code.
   • Initialize an array with the third letter of the code.

2. Cipher Generation:

   • Fill the array with decreasing values from the third letter of the code.
   • Handle different cases to ensure the array is filled correctly.
   • Print the generated substitution cipher.

3. Message Encoding/Decoding:

   • Prompt the user to enter a message to encode or decode.
   • Use the generated substitution cipher to encode or decode the message.
   • Output the encoded or decoded message.

4. Output:

   • Print the encoded or decoded message.
   • Print the author's name.

Author

MANOJ SAHUKAR