https://github.com/dms-codes/kriptografi-substitution

Simple Substitution Cipher This Python script demonstrates a simple substitution cipher. It allows you to encrypt and decrypt text using a custom cipher alphabet.
https://github.com/dms-codes/kriptografi-substitution

python substitution-cipher

Last synced: 2 days ago
JSON representation

Simple Substitution Cipher This Python script demonstrates a simple substitution cipher. It allows you to encrypt and decrypt text using a custom cipher alphabet.

• Host: GitHub
• URL: https://github.com/dms-codes/kriptografi-substitution
• Owner: dms-codes
• Created: 2022-11-15T14:26:16.000Z (about 2 years ago)
• Default Branch: main
• Last Pushed: 2023-10-01T07:46:19.000Z (over 1 year ago)
• Last Synced: 2023-10-01T08:31:55.384Z (over 1 year ago)
• Topics: python, substitution-cipher
• Language: Python
• Homepage: https://github.com/dms-codes/kriptografi-substitution
• Size: 0 Bytes
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

README

        
# Simple Substitution Cipher

This Python script demonstrates a simple substitution cipher. It allows you to encrypt and decrypt text using a custom cipher alphabet.

## Overview

A substitution cipher is a method of encrypting plaintext by replacing each letter with another letter. In this script, you can specify a custom cipher alphabet to perform both encryption and decryption.

- The `plaintext` variable contains the text that you want to encrypt.

- The `cipheralphabet` variable contains the custom substitution alphabet.

- The `plainalphabet` variable contains the standard uppercase alphabet.

The script provides two main functions:

- `encrypt(plaintext, cipheralphabet)`: Encrypts the input `plaintext` using the specified `cipheralphabet` and returns the ciphertext.

- `decrypt(ciphertext, cipheralphabet)`: Decrypts the input `ciphertext` using the specified `cipheralphabet` and returns the original plaintext.

## Usage

1. Customize the `plaintext` and `cipheralphabet` variables in the script to set your desired input text and custom substitution alphabet.

2. Run the script by executing the following command in your terminal:

   ```bash

   python your_script_name.py

   ```

3. The script will perform the encryption and decryption using the specified inputs and print the results.

4. You can modify the `plaintext` and `cipheralphabet` variables in the script to test different inputs and substitution alphabets.

## Example

Suppose you have configured the script with the following settings:

- `plaintext = 'SELAMAT DATANG DI KELAS KRIPTOGRAFI'`

- `cipheralphabet = 'QAMOCDBHRUWLKJNVTZFISPEGYX'`

After running the script, you will see the ciphertext and the decrypted plaintext as output.

## Security Note

This is a simple example of a substitution cipher and should not be used for secure encryption. In practice, more complex encryption algorithms and key management are required for secure communication.

## License

This script is provided under the [MIT License](LICENSE).

```

Replace `"your_script_name.py"` with the actual name of your script. Customize the README.md file further if needed to include additional information or usage examples for your project.